The Refrigeration Mentor Podcast
This podcast is all about training, education and mentorship for commercial refrigeration and HVAC professionals. My goal to help you develop your knowledge and skills, to master the art of refrigeration. I will have expert guests from around the world joining us. We will have different conversations on technical topic's like system troubleshooting, supermarket refrigeration and CO2 refrigeration. Featuring technicians and engineers to manufacturers and many other industry expert join us to share their knowledge and wisdom. I will have conversations about mental health, mindset, and personal and professional development. My goal is to help you become 1% better than yesterday. Let's get a conversation going!
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Episode 418. Daikin 2-Stage CO2 Condensing Unit Servicing and Troubleshooting with Massimo Pellizzari (Part 1)
08/10/2026
Episode 418. Daikin 2-Stage CO2 Condensing Unit Servicing and Troubleshooting with Massimo Pellizzari (Part 1)
Learn more about Refrigeration Mentor Customized Technical Training Programs at This is the first of a 2-part episode in our “CO2 Unfiltered” series where we’re joined by Massimo Pellizzari, Senior Commissioning Engineer at Daikin, for an in-depth look at Daikin’s two-stage CO2 condensing units. Massimo explains the design philosophy behind these systems, how they differ from traditional refrigeration equipment and the best practices for installation, commissioning, evacuation, charging and servicing. Whether you're new to CO2 or looking to sharpen your troubleshooting skills, this episode is packed with practical insights to help technicians work more faster and more confidently with CO2 condensing units. In this episode, we discuss: (03:10) Why CO2 condensing units are becoming more common worldwide (05:30) Daikin's two-stage CO2 condensing unit lineup (07:15) Swing compressor technology and compressor design (09:45) Oil in CO2 systems (11:45) Two-stage compression and reducing discharge temperatures (17:30) Controller features, monitoring and diagnostics (24:00) Refrigerant charge calculations and piping design software (33:30) Factory testing, vibration protection and installation considerations (38:30) Service valves, access points and system maintenance (49:30) Pressure testing and evacuation procedures (50:55) Opening EEVs and solenoid valves during evacuation (51:00) Refrigeration-grade CO2 and refrigerant purity (53:10) Proper CO2 charging procedures and overcoming the triple point (57:30) Service ports, valve design and final technician tips Helpful Links & Resources:
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Episode 417. CO2 Rack Troubleshooting & Fine-Tuning: Lessons from the Refrigeration Mentor Community
08/06/2026
Episode 417. CO2 Rack Troubleshooting & Fine-Tuning: Lessons from the Refrigeration Mentor Community
Learn more about Refrigeration Mentor Customized Technical Training Programs at This episode includes highlights from a recent live Refrigeration Mentor Community meetup where we covered real-world CO2 rack issues, system tuning, troubleshooting, and startup strategies, sharing practical techniques we've learned in the field. We covered gas cooler fan tuning, transcritical operation, oil separator maintenance and service valve tips. This meetup featured experienced CO2 technicians Patrick Gregory, Noah Walker, Andrew Freeburg, Billy Carlson and others sharing valuable insights that can help fellow technicians diagnose problems faster, improve system performance, and learn from the experience of others. In this episode, we discuss: (02:15) Fine-tuning CO2 racks (05:20) Gas cooler fan control strategies (09:00) Rack tuning (12:00) Why every CO2 system requires its own tuning strategy (16:00) Oil separator filter replacement and diagnosing oil trip issues (18:00) Proper rack pump-down procedures (20:00) Service valve troubleshooting (23:45) Common ball valve issues Helpful Links & Resources:
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Episode 416. CO2 Liquid Overfeed Pump Problems
08/04/2026
Episode 416. CO2 Liquid Overfeed Pump Problems
Learn more about Refrigeration Mentor Customized Technical Training Programs at This episode is the first of a 10-part “CO2 Unfiltered” series, where we’re joined by Ernesto Rodriguez to discuss hermetic CO2 pumps. Ernesto has decades of practical knowledge to help technicians understand how CO2 pumps really work and why so many failures can be prevented through proper design and installation. Here, we cover pump selection and sizing, and troubleshooting, including how to recognize cavitation and flash gas, avoid common piping mistakes, optimize pump performance, and commission CO2 pumps with confidence. In this episode, we discuss: (01:15) Introduction to CO2 pumps and why they matter (04:50) Internal vs. external recirculation systems (09:20) Pump construction and hydrostatic bearing lubrication (15:45) Variable frequency drives and operating at the correct pump curve (19:20) Recirculation rates and cascade system applications (24:15) Pump sizing fundamentals, NPSH, and avoiding cavitation (33:45) Flow regulation, differential pressure regulators, and system balance (46:30) Installation best practices, suction piping, elbows, and insulation (55:00) Proper pipe sizing and maintaining flow velocity (01:01:15) Multiple pump installations and preventing turbulence (01:09:15) Startup, commissioning, and maintenance checks (01:12:30) Troubleshooting cavitation, flash gas, vibration, and pump failures Helpful Links & Resources:
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Episode 415. Advanced Copper and Copper Alloy Brazing with Mike Belanger
07/27/2026
Episode 415. Advanced Copper and Copper Alloy Brazing with Mike Belanger
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this episode, we’re teaching advanced brazing and soldering skills for copper piping with Mike Belanger from the Copper Development Association. Mike teaches soldering and brazing fundamentals: proper cutting, reaming, cleaning, minimal fluxing, full insertion, correct heat application. This session also covers vital tips for how to properly braze starting with the foundations of what refrigeration techs need to know and how to make better joints and prevent leaks. In this episode, we discuss: (05:57) Soldering Basics (11:17) Six-Step Joint Soldering Method (15:42) Capillary Space Science (18:31) Heat And Filler Technique (20:00) Avoiding Voids And Leaks (27:45) Brazing Method (34:30) Flux Temperatures And Torches (37:09) Torch Tip Sizing (38:10) 3T Penetration Rule (39:23) Fillet Shoulder Strength (40:41) Braze Test Breakdown (44:29) Annealing Pressure Derating (48:29) Nitrogen Purging Essentials (51:25) Dissimilar Metals and Flux (55:13) High Pressure CO2 Piping Helpful Links & Resources:
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Episode 414. Breaking the Stigma and Learning to Love CO2
07/24/2026
Episode 414. Breaking the Stigma and Learning to Love CO2
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this episode, we’re talking about how techs are breaking the common fears and apprehensions around CO2 refrigeration as it grows and systems become more controls-heavy. I’ll share my own early intimidation with CO2, including having to call for senior help. We’ll discuss how learning critical CO2 refrigeration pillars like P&IDs, wiring diagrams, I/O schedules, and refrigeration schedules will help techs get more comfortable with CO2 and learn faster. In this episode, we cover: (00:48) My First CO2 Wakeup (04:56) Training Gaps in the Refrigeration Industry (06:40) Investing in Yourself (09:16) Field Diagnosis Mindset (09:56) Using P&IDs and Prints (13:34) Owning Your Career Growth (16:35) Group Learning Opportuities (20:43) Training the Next Generation of Techs Helpful Links & Resources:
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Episode 413. My 4-Pillar Framework to Learn CO2 Refrigeration Faster
07/22/2026
Episode 413. My 4-Pillar Framework to Learn CO2 Refrigeration Faster
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this episode, I’m breaking down my 4-pillar framework used in my supermarket and CO2 refrigeration training programs. These pillars include understanding system design, electrical, the input and output (I/O) schedule, and the refrigeration legend/schedule. Building your refrigeration knowledge on these pillars is critical for technicians to identify what’s normal, verify issues systematically, and solve harder problems faster. In this episode, we cover: 01:52 The 4-Pillar Refrigeration Mentor Framework 02:55 System Design, P&IDs and Piping Schematics 03:50 Electrical Systems, Metering and Wiring Diagrams 05:03 Input and output (I/O) Schedules 06:47 Refrigeration Schedule/Legend (Normal Operation) 08:35 How to Diagnose Issues Faster Helpful Links & Resources:
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Episode 412. Live Group Troubleshooting: Working Through Issues Fellow Techs (Community Meetup Replay)
07/16/2026
Episode 412. Live Group Troubleshooting: Working Through Issues Fellow Techs (Community Meetup Replay)
Learn more about Refrigeration Mentor Customized Technical Training Programs at This episode is a replay of a recent Refrigeration Mentor Community Meetup where we helped fellow techs with some technical CO2 refrigeration troubleshooting. The live group discussed a problematic CO2 store with high superheat, recurring low-temp oil issues, phase-loss/current-imbalance alarm and others. You’ll hear solutions, tips and advice from the fellow techs on the call, including Mikaela Law, Patrick Gregory, Andrew Freeburg, Billy Carlson, Noah Walker, and others. Interested in joining the next meetup? In this episode, we cover: (01:39) High Superheat and Injection (03:20) Liquid Line Drop and Flashing (05:14) Pulse Valve Orifice Fix (08:10) Oil Logging (14:41) Pressure Differential and Port Sizing (19:34) HP Valve Failure (23:46) Ice Cream Frost Airflow Hack (26:44) Designing a Custom Divider Prototype (28:39) Selling Value to Customers (32:54) VFD Phase Loss Troubleshooting (35:37) Drive vs Compressor Diagnosis (38:46) Bypass Tests and Amp Imbalance (40:08) Using Bitzer Software Helpful Links & Resources:
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Episode 411. Fast-Tracking as a New Supermarket Refrigeration Tech with Jacob Decker
07/13/2026
Episode 411. Fast-Tracking as a New Supermarket Refrigeration Tech with Jacob Decker
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this conversation, I sit down with Supermarket Refrigeration Technician Jacob Decker to discuss how newer technicians can land opportunities and gain experience faster. Jacob shares how he moved from residential work and tech school into commercial refrigeration and a full time career with Walmart through connections, overcoming fears, learning form mistakes, and how he benefited from mentorship and structured training. We also cover common challenges for new techs, plus practical habits to build that will fast track the learning curve and open up so many opportunities for building your career in the industry. In this episode, we discuss: (01:19) Breaking Into Refrigeration (02:44) First Commercial Job Lessons (05:42) Biggest Surprises and Challenges Entering Refrigeration (07:20) Learning from Mistakes (12:39) Mentorship and Generational Shifts in the Trades (16:10) Common Pitfalls for New Refrigeration Techs (18:32) Building ConfideEpisode 186: How To Attract Young People To The Refrigeration Trade (20:40) Checklists (25:08) Future Refrigeration Tech and CO2 (26:47) Work-Life Balance in Refrigeration (28:35) Building Better Work Habits (34:42) Mental Health in the Trades Helpful Links & Resources:
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Episode 410. Oil Tips for Copeland Compressors
07/09/2026
Episode 410. Oil Tips for Copeland Compressors
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this episode, I’ll share a couple quick and practical oil tips for technicians working on racks with Copeland compressors - often times preventing unnecessarily draining and replacing good oil. These cover properly identifying oil issues, important checks, tips for removing oil from the compressor without wasting it. These tips will help techs save time, reduce mess and avoid charging customers for unnecessary oil. In this episode, we discuss: (00:49) Checking the Oil Pump Screen (01:20) Three Ways to Save Oil (02:57) Faster Oil Fixes (06:13) How to Save Time, Money and Mess on Service Calls Helpful Links & Resources:
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Episode 409. How New Technology & Training Are Transforming the Trades (World Refrigeration Day Panel)
07/02/2026
Episode 409. How New Technology & Training Are Transforming the Trades (World Refrigeration Day Panel)
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this special episode, we’re marking World Refrigeration Day (June 26) with a panel discussion on how technology and continuous training are transforming the skilled trades, particularly in attracting and retaining new technicians. This panel features Amrit Robbins, CEO of Axiom Cloud, Kyle Eastwood, Refrigeration Specialist at Axiom Cloud, and Joe Stough, VP of Strategy and Technology at ARI. We cover how the industry can better support technicians by combining training, mentorship and technology, as well as leveraging AI to learn, reduce diagnostic time, cut callbacks, and even reduce overnight and weekend work. In this episode, we discuss: (04:19) Why Techs Matter More Now Than Ever (05:34) Being Better Prepared for Service Calls (12:38) Training, Mentorship and AI in Refrigeration (17:50) Proactive Maintenance (19:40) CO2 Refrigeration Systems (21:33) Breaking the CO2 Stigma (24:40) Advice for CO2 Calls (25:36) Technician Shortage Reality (26:59) Two-Part Refrigeration Industry Fix (27:54) Making Trades Attractive (33:29) Validating Technician Training (42:05) Proving ROI on Training Helpful Links & Resources:
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Episode 408. Retaining and Mentoring New Technicians (World Refrigeration Day Panel)
06/29/2026
Episode 408. Retaining and Mentoring New Technicians (World Refrigeration Day Panel)
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this special episode, we’re marking World Refrigeration Day (June 26) with a panel discussion on retaining skilled refrigeration tradespeople and the importance of mentoring the next generation. Panelists Aidan Lucey, Erik Holland, Andrew Freeburg, Patrick Gregory, and Noah Walker discuss what kept them in the trade early on, as well as what great mentorship looks like, the challenges apprentices face today, and rapidly increasing technology and information quality across the refrigeration industry. In this conversaton, we discuss: (00:44) Why Mentorship Matters In the Trades (05:50) What Kept People in the Trade (12:33) Defining Great Mentorship (19:36) Challenges for Apprentices Today (25:13) Training Under Pressure (25:58) Technical Complexity and AI in the Trades (26:58) Building Safe Learning Culture (30:30) Mentorship Structures That Work (33:39) Career Advice for Apprentices (39:06) World Refrigeration Day Reflections (40:01) Mentor Lessons You Can’t Google (45:57) Recruiting the Next Generation of Refrigeration Professionals Helpful Links & Resources: Aidan Lucey on Erik Holland on Andrew Freeburg on Partick Gregory on
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Episode 407. Can You Solve This Service Call? Test Your Knowledge
06/27/2026
Episode 407. Can You Solve This Service Call? Test Your Knowledge
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this episode, we’re introducing a new segment called “Can You Solve This Service Call?” using real life examples to test your knowledge as a technician walking into a call. In this example, we’ve got a compressor running continuously, some key readings, however it’s determined the compressor itself isn’t the issue. We’ll run through critical checks and processes for this common situation, all in an effort to outline things to look for and help techs identify root cause issues faster and more confidently. In this episode, we cover: (01:34) Example Service Call (04:25) Sequence of Checks (05:25) Key Check: Filter Drier (09:30) Think Restriction First (10:06) Service Call Checklists (12:09) Building Customer Trust Helpful Links & Resources:
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Episode 406. Tech Journey: Tim Homan - From Vegas Racks to CO2 Cascades
06/22/2026
Episode 406. Tech Journey: Tim Homan - From Vegas Racks to CO2 Cascades
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this conversation, we sit down with longtime refrigeration technician Tim Homan to discuss his path from casino in-house work in Las Vegas to “hardcore” supermarket rack and CO2 service. We love sharing the journeys of fellow techs to motivate and inspire those across the industry. Here, Tim talks about honing strong electrical/refrigeration fundamentals, reading manuals and investing heavily in training and tools as crucial to his diverse industry successes. We also dig into some Tim’s real life service call stories, as well as managing workload stress, relationship-building and thoughts about the future of refrigeration. In this episode, we cover: (01:00) Tim Homan’s Trade Journey (02:12) Emphasis on Training (03:44) CO2 Refrigeration and Glycol Work (05:52) Booster vs Cascade Systems (08:35) Liquid Line Fixes (12:12) Following Mnaufacturer Specs (17:57) Realities of Refrigeration Maintenance Checks (25:24) Reading Schematics Faster (27:59) Skills Refrigeration Techs Need Now (29:12) Refrigerant Law and Codes (29:32) Evacuation and Hose Purging (30:37) Future of CO2 Tech (32:42) Propane and Micro Systems (34:44) Investing in Tools (37:33) CO2 Gauges and Safety (39:14) E3 Controllers and Programming (40:44) Adiabatic Towers (43:08) CO2 Refrigeration Evolution and Design (46:01) Advice for Refrigeration Technicians Helpful Links & Resources:
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Episode 405. 5 Things To Check Before Needlessly Replacing a Compressor
06/18/2026
Episode 405. 5 Things To Check Before Needlessly Replacing a Compressor
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this episode, I’m outlining five things refrigeration techs need to check before replacing a compressor to avoid an unnecessessary change out. Between 30-40% of swapped compressors are found to have no real issue, and these checks will help technicians uncover root-cause issues and potentially avoid costly and time-consuming work that might not be needed. This episode details the five checks: oil level and oil management, compressor superheat, electrical health, operating conditions, and controller/sensor accuracy. We also cover key readings and how to better understand failure modes and prevent repeat failures. In this episode, we discuss: (00:48) How to Avoid Replacing Good Compressors (03:16) Check 1: Oil Management (04:27) Check 2: Compressor Superheat (06:13) Check 3: Electrical Health (07:14) Check 4: Operating Conditions (08:19) Check 5: Controllers and Sensors (09:56) Inspecting a Failed Compressor (12:14) Documentation and Preventing Repeated Failures Helpful Links & Resources:
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Episode 404: Cool Intelligence: Utilizing AI in Refrigeration (Celebrating World Refrigeration Day)
06/15/2026
Episode 404: Cool Intelligence: Utilizing AI in Refrigeration (Celebrating World Refrigeration Day)
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this episode, we’re joined by longtime refrigeration technician and Refrigeration Mentor Community Ambassador Andrew Freeburg to discuss World Refrigeration Day (June 26) and this year’s theme, “Cool Intelligence.” We explore how the industry’s real intelligence comes from the experience, judgment, and problem-solving of technicians, engineers, designers, and operators who protect the cold chain, food safety, energy efficiency and daily life. Conversely, also dive into how artificial intelligence (AI) can support technicians today, working in conjunction with hands-on skills, verification, intuition, and building customer trust. In this episode, we cover: (00:08) World Refrigeration Day (00:57) Defining “Cool Intelligence” (02:21) Field Judgment Under Pressure (05:36) Supermarket Refrigeration and Cold Chain (11:46) AI in the Refrigeration Industry (16:10) Building Confidence and Celebrating Wins (18:27) The Refrigeration Industry Intelligence Gap (28:30) Advice for New Refrigeration Techs Helpful Links & Resources: Andrew Freeburg on
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Episode 403. CO2 Liquid Line Piping
06/11/2026
Episode 403. CO2 Liquid Line Piping
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this episode, we’re discussing CO2 piping - particulatily liquid line. takeoff arrangements. We cover takeoff arrangements, loop systems, also some important technical information manufacturers recommend which give you a reliable blueprint of look for when you’re on your service calls. We also talk about manufacturer specs, asking “why” behind designs and best practices when dealing with CO2 piping. In this conversation, we cover: (02:42) Loop and Circuit Designs (03:59) Side vs Bottom Takeoff (06:13) Flash Gas and Underfeeding (08:37) Following Manufacturer Specs (09:28) Piping Best Practices (09:59) Asking Better “Why” Questions Helpful Links & Resources:
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Episode 402. Why Skills Competitions Matter for Refrigeration Technicians
06/08/2026
Episode 402. Why Skills Competitions Matter for Refrigeration Technicians
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this episode, we’re diving into provincial/state, national, and WorldSkills events for tradespeople - high-pressure, real-world competitions that build many technical and troubleshooting skills. These programs strengthen our refrigeration trade amid rapid change (CO2, A2L, advanced controls, energy efficiency etc.) and ongoing technician shortages, while developing future leaders and improving company performance. Not only are these competitions fun and challenging, the long-term career benefits and learning - especially from global standards and practices - make these skills competitions incredibly worthwhile. Links below to find out more about national and global skills competitions. In this conversation, we cover: (01:07) Discovering Skills Programs (04:02) Benefits of Skills Competitions for Tradespeople (06:53) Investing in Skills Development (10:21) Learning by Doing Under Pressure (13:07) Modernizing Training Worldwide (19:27) WorldSkills and National Skills Competitions (22:28) Becoming and Elite Refrigeration Technician Faster Helpful Links & Resources: GAME:
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Episode 401. Troubleshoot Systems and Compressors Quicker (Get My Free Guide)
06/04/2026
Episode 401. Troubleshoot Systems and Compressors Quicker (Get My Free Guide)
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this conversation, I explain how techs can troubleshoot compressors and refrigeration systems faster and more confidently. I’ll walk you through the content of my free 17-page System and Compressor Guide built around 23 key pressure/temperature checkpoints and six common mechanical compressor failure modes. This guide outlines practical steps for compressor replacement and verification, lubrication, oil breakdown and more. Knowing these will result in faster root-cause identification, fewer manager support calls, quicker performance, and even stronger job-interviews. In this episode, we cover: (02:32) Knowing Refrigeration Fundamentals First (02:50) 23 System Checkpoints (03:54) Reading The System Story (06:49) Patterns In Failures (08:38) Six Mechanical Failures (10:22) Compressor Swap Process (12:31) Overheating And Oil (15:24) Flooded Starts (18:06) Slugging Root Causes (18:54) Shell Design Differences (19:22) Floodback And Washout (23:41) Fast Diagnostic Checkpoints (25:19) Oil Loss Root Causes Helpful Links & Resources:
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Episode 400. Top 8 Critical CO2 Sensors Every Tech Should Know with Andre Patenaude
06/01/2026
Episode 400. Top 8 Critical CO2 Sensors Every Tech Should Know with Andre Patenaude
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this milestone 400th episode, we’re joined by Andre Patenaude of Copeland to explain 8 critical sensors on CO2 refrigeration systems (video link to this seminar below). Andre breaks down the most critical CO2 refrigeration sensors found in supermarket systems, common failure modes, troubleshooting strategies, and how to prevent catastrophic system shutdowns, product loss, and compressor damage in transcritical CO2 systems. He also explains how technicians, service managers, and contractors can improve reliability through proactive monitoring, redundancy strategies, trend analysis, and smarter control logic. Thank you for listening, following and helping us reach 400 episodes! In this episode, we cover: (02:27) Why Critical Sensors Matter in CO2 Refrigeration (08:54) Booster System (13:19) Gas Cooler Outlet Temp (23:31) Mitigation Strategies (31:24) Low Ambient Bypass and T2 Sensor (37:30) Drop Leg Pressure Transducer (41:14) Fan Modulation Chain Reaction (43:01) P1 Transducer Failover Options (45:46) Proactive P1 Calibration Checks (47:29) P2 Flash Tank Pressure Basics (51:38) Suction Group Transducer Backup (53:54) Oil Level Sensors (57:09) Adiabatic Pre Cool Sensor 7A (01:01:46) Ambient Sensor 7B Water Control (01:10:27) Dry Gas Cooler TD Sensor Helpful Links & Resources:
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Episode 399. 5 Electrical Troubleshooting Tips for Refrigeration Techs
05/28/2026
Episode 399. 5 Electrical Troubleshooting Tips for Refrigeration Techs
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this episode, I’m breaking down 5 core electrical troubleshooting tips to help refrigeration technicians solve issues faster and more confidently. These encompass electrical sequence of operation, checking and verifying voltage, wiring diagrams and using yoru understanding of mechanical problems to uncover the cause of electrical failures. Electrical systems are so important to understand in refrigeration because this is where techs spend a large amount of time on service calls. In this episode, we discuss: (00:48) Why Refrigeration Electrical Knowledge Matters (01:58) Electrical Sequence Of Operation (04:41) Voltage Testing Basics (08:07) Voltage Drop Tricks (09:01) Tracing Circuits Methodically (11:20) Relationship Between Electrical and Mechanical Problems Helpful Links & Resources:
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Episode 398. How to Prepare for the Summer Rush in Supermarket Refrigeration
05/25/2026
Episode 398. How to Prepare for the Summer Rush in Supermarket Refrigeration
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this episode, we’re talking about how refrigeration technicians and contractors can prepare for the summertime service-call rush. Higher ambient temperatures often make systems run harder, so preparation should start early. In this episode, we’ll cover what to check for on the technical side, tips for working smarter, more efficiently, and also planning personal time and maintaining balance between of summer leisure time, long on-call days and prioritizing severe calls. In this episode, we discuss: (00:48) Summer Rush in Refrigeration (01:44) Pre-summer System Checks (02:46) Heat Related Electrical Failures (03:54) Diagnosing Issues Faster Under Pressure (05:20) Prioritizing Calls On-Call (06:31) Planning Time Off Early (07:23) Packing And Preparing For Long Days (10:47) Refrigeration Preventive Checks (14:04) Using AI in Refrigeration Helpful Links & Resources:
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Episode 397. How to Land and Nail a Refrigeration Technician Job Interview
05/21/2026
Episode 397. How to Land and Nail a Refrigeration Technician Job Interview
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this episode, I’ll explains how technicians can stand out in refrigeration job interviews. I’ll share tips on building confidence, developing a troubleshooting mindset, and communicating technical processes step by step, including fundamentals like superheat, subcooling, wiring diagrams, controls, and compressor diagnostics. Many companies hire for attitude, reliability, and problem-solving more than years of experience, and knowing how to demonstrate work ethic, professionalism, business-minded value and asking strong questions will put you ahead of the pack when it comes to competing for a refrigeration technician job. In this episode, we cover: (00:48) Job Interview Mindset (02:24) Building Trust Through Honesty (04:04) How to Talk Technical Confidently (07:25) Job Interview Preperation (11:39) Communicating Stepwise (15:07) Value of Showing Ambition (19:23) On-Call Work Ethic (25:10) Asking Smart Questions (28:58) Professional Reputation Helpful Links & Resources:
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Episode 396. 7 Basics Every Supermarket Refrigeration Technician Must Know
05/15/2026
Episode 396. 7 Basics Every Supermarket Refrigeration Technician Must Know
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this episode, I’m sharing the top seven basics every supermarket refrigeration technician needs to master. These encompass the fundamentals like superheat, subcooling, compression ratio, refrigerant flow, wiring diagrams, ladder diagrams, P&IDs, refrigeration schedules and sequence of operations. We’ll also discuss safe electrical troubleshooting and proper meter use, understanding rack operation and the importance of controls, sensors, and communication networks. Revisiting these basics - no matter how long you’be been in the industry - are crucial to eliminating guesswork, diagnosing issues more confidently, cutting troubleshooting time and reducing callbacks. In this episode, we cover: (00:48) Seven Basics of Supermarket Refrigeration (00:55) Refrigeration Fundamentals (02:09) Electrical Diagrams (04:20) Meter Skills (05:09) Supermarket Rack Operation Basics (06:44) Case Components (07:17) Refrigeration Controls (11:18) Building Troubleshooting Habits (13:43) Safety on Refrigeration Job Sites Helpful Links & Resources:
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Episode 395. Basics of Refrigeration: Importance of Revisiting the Fundamentals
05/13/2026
Episode 395. Basics of Refrigeration: Importance of Revisiting the Fundamentals
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this episode, we’re returning to refrigeration fundamentals and breaking down the foundations - compressor, condenser, metering device, evaporator, and refrigerant flow. We cover key checks like suction/discharge behavior, condenser air and pipe temperatures, subcooling, fan operation, TXV function, and calculating superheat to prevent liquid or wet gas returning to the compressor. This episode also includes practical tips from the field, including smarter ways to handle oil checks, condenser coil cleaning techniques, and the importance of reading manuals. It's not all about the high level stuff - mastering the basics is truly the key to building confident refrigeration techs and stronger, less stressed service teams. In this episode, we discuss: (00:48) Refrigeration Basics (01:26) Compressor Fundamentals (03:11) Condenser Temps and Subcooling (04:27) Metering Devices and Superheat (09:08) Field Basics Gauges Oil and Coils (11:33) Manuals and System Checks (13:12) TXV Troubleshooting Steps Helpful Links & Resources:
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Episode 394. Condensing Unit Checkpoints
05/07/2026
Episode 394. Condensing Unit Checkpoints
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this episode, I’m sharing a consistent set of checkpoints during startup and troubleshooting on condensing units and walk-ins. We walk through key measurements from the compressor through the system, including suction pressure/temperature, discharge temperature, volts/amps, oil temperature, condenser inlet/outlet conditions, receiver inlet/outlet checks, liquid line temperature changes, and evaporator outlet pressure/temperature to verify subcooling and superheat. Write these checkpoints down, learn from other techs, and leverage data to spot trends and root causes to speed up service and reduce callbacks. In this episode, we cover: (01:23) Refrigeration System Checkpoints Overview (02:31) Compressor Baseline Checks (04:42) Condenser Subcooling Checks (07:32) Receiver and Liquid Line (08:24) Evaporator Superheat Checks (09:35) Airflow Defrost and Tools (10:56) Building Your Troubleshooting Framework Helpful Links & Resources:
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Episode 393. Step-By-Step Supermarket Installation
04/30/2026
Episode 393. Step-By-Step Supermarket Installation
Learn more about Refrigeration Mentor Customized Technical Training Programs at This conversation is a detailed walkthrough of supermarket refrigeration installation. We cover phases from pre-construction drawings, bidding, ordering, kickoff meetings, and coordination with other trades, through layout before concrete, trench and overhead piping, hangers, brazing with nitrogen purge, section-by-section pressure testing and documentation, and deep/triple evacuation. We’ll also discuss commissioning and startup basics, including verifying sensors/controls, charging strategy, oil system checks, staged circuit startup, and final turnover items. In this episode, we cover: (02:48) Why Installation Is Important for Refrigeration Techs to Know (05:01) Preconstruction Drawings and Planning (07:34) Ordering Gear and Timelines (09:16) Kickoff Meetings and Trade Coordination (10:47) Pipe Routes, Trenches and Hangers (15:34) Equipment Placement and Roof Curbs (16:46) Brazing Specs and Rough-In Checks (24:49) Pressure Testing (26:49) Drains, Walk-In Boxes and Coil Layout (30:56) Hanging Evaporator Coils (32:22) Roof Flashing Tips (34:34) Pressure Test Evac (38:32) Controls Wiring Layout (43:00) Leak Proof Brazing (46:03) Charging (47:50) Oil System Startup (52:57) Final Commission Turnover Helpful Links & Resources:
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Episode 392. Transitioning From Technician to Manager: Building Leadership Skills in Refrigeration with Todd Ernest of Climate Pros
04/27/2026
Episode 392. Transitioning From Technician to Manager: Building Leadership Skills in Refrigeration with Todd Ernest of Climate Pros
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this conversation, we’re discussing how refrigeration techs can make the transition from technician to manager, with Todd Ernest, Executive Chairman of Climate Pros. Todd has some great insights on management skills, including technical excellence versus leadership excellence, emotional intelligence and coaching ability. We also dive into honing communication skils, listening, avoiding favorites, delegating instead of doing, and accountability - the softer skills that are critical for technicians who want to make the career jump into management. In this episode, we cover: (05:56) Tech vs Manager Mindset (08:59) Traits of Successful Leaders (09:53) Communication Skills (17:59) New Manager Mistakes (23:58) Delegation in the Field (26:04) Accountability Shift (29:03) Management Reality Checks (29:53) Crucial Conversations Manager Need to Have (31:34) Communication That Lands (33:03) Offering Praise and Listening (37:22) Coaching and Establishing Control (39:23) Learning on the Road Helpful Links & Resources:
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Episode 391. CO2 Oil Management (Part 2): Common Failures, Troubleshooting and Reservoir Sizing with Alessandro Silva of Bitzer
04/23/2026
Episode 391. CO2 Oil Management (Part 2): Common Failures, Troubleshooting and Reservoir Sizing with Alessandro Silva of Bitzer
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this second part of a two-part episode, we’re diving deep into oil management for CO2 refrigeration systems with Alessandro Silva, Senior Application Engineer at Bitzer. Here, Alessandro covers oil reservoir sizing, common failures and what to look for during maintenance checks and root-cause troubleshooting to help refrigeration techs perform more efficient service calls and be feel more confident in the field. You can also follow along this webinar on our In this episode, we discuss: (00:58) Flash Gas Bypass Basics (01:47) Oil Reservoir Sizing (03:22) Differential Pressure Range (05:25) Load Changes and Oil Flow (06:28) Parallel Compression Setup (10:44) Ejectors and Subcooling Options (17:41) Low Temp Stage Recovery (23:05) Compressor Data Benchmarks (24:15) Compressor Software Diagnostics (25:45) Low Superheat Fixes (27:05) Stepper Vs Pulse Valves (30:50) Oil Separator Maintenance (33:26) Strainers And Trend Graphs (35:30) Pipe Sizing For Oil Return (37:57) CO2 Refrigeration Market Shift Helpful Links & Resources:
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Episode 390. CO2 Oil Management (Part 1): Lubrication Basics, Oil Selection, Testing, and Troubleshooting with Alessandro Silva of Bitzer
04/21/2026
Episode 390. CO2 Oil Management (Part 1): Lubrication Basics, Oil Selection, Testing, and Troubleshooting with Alessandro Silva of Bitzer
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this first part of a two-part episode, we’re diving deep into oil management for CO2 refrigeration systems with Alessandro Silva, Senior Application Engineer at Bitzer. Alessandro covers what technicians, designers, and engineers need to know about oil management, including lubrication systems, oil functions, oil protection, as well as proper tools and gauges, oil level management, controls and a ton of troubleshooting tips for service techs to better understand oil management for CO2 systems. You can also follow along this webinar on our In this episode, we discuss: (07:49) Lubrication Systems (10:10) Oil Functions and Safety Controls (12:43) Measuring Oil Differential Pressure (13:21) Tools and Safety for CO2 Service (18:07) Oil Grades and Application Ranges (20:22) Oil Circulation Basics (21:46) Choosing CO2 Compressor Oils (22:36) Oil Change Intervals (25:04) Oil Testing Limits (27:12) Acidity And CO2 Degassing (32:20) Basic Oil Management Layout (36:48) Low Pressure Reservoir Setup (38:41) CO2 Cascade And Pumped Systems (40:39) Cascade Heat Exchanger Placement Helpful Links & Resources:
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Episode 389. TXV & Superheat 101 with Andrew Freeburg
04/17/2026
Episode 389. TXV & Superheat 101 with Andrew Freeburg
Learn more about Refrigeration Mentor Customized Technical Training Programs at In this conversation, we’re covering the basics of TXV’s (thermostatic expansion valves) and superheat with longtime tech, teacher and Ambassador, Andrew Freeburg. We breakdown the purpose of superheat, how to measure it, and variations between different applications and manufacturer specs. We also discuss different supermarket conditions, proper TXV adjustments and service tips every refrigeration technician needs to know to thoroughly understand these important system components. In this episode, we cover: (02:08) Superheat Basics Explained (04:04) Measuring Superheat (05:25) Target Superheat Ranges (14:19) When To Adjust TXVs (17:32) TXV Types And Selection (19:00) How A TXV Works (25:44) Bulb Placement (28:32) Equalizer Line Placement (29:30) Equalizer Tube Oil Seal Story (31:10) Bulb Mounting and Insulation (37:18) Low Temp Startup and Pull Down (40:35) Cold Capillary Tube Failures (45:04) Refrigerant Glide and Dew Point Helpful Links & Resources:
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