Learn more about Refrigeration Mentor Customized Technical Training Programs at www.refrigerationmentor.com/courses

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In this conversiotion, we're walking step-by-step through a compressor change-out from a recent service call with guest and Refrigeration Mentor Community Ambassador, Andrew Freeburg. Andrew covers covering initial safety steps, plus detailed steps for isolating lines, locking out power, shutting off crankcase heaters, recovering refrigerant, and transferring fittings and oil floats. Andrew also shares installation practices and how he traced back the cause of the issue and used that to efficiently solve the problem. This episode is loaded with tips of what to look for, what to do, and things to avoid on these types of service calls.

In this episode, we discuss:

(02:04) Using AI To Catch Mistakes

(03:46) Refrigeration Compressor Failure

(04:55) Safe Isolation And Recovery

(06:10) Lockout And Removal Steps

(11:09) New Compressor Checks

(14:14) Gaskets And Reassembly

(17:42) Oil Choices And Vacuum

(19:03) Torque Specs And Wiring

(24:24) Startup And Oil Change

(25:57) Copper Plating Evidence

(27:20) Valve Plates

(31:19) Root Cause Floodback

(33:00) Mechanical Controls Limits

(34:05) Oil Change Setup

(35:52) Nitrogen Push Method

(39:23) Draining Compressors

(42:30) Oil Pressure Checks

(49:18) Moisture Removal Filters

Helpful Links & Resources:

Follow Andrew on LinkedIn

Episode 329. The Ins & Outs of Compressors

Episode 295. A Compressor Story: The Key to Faster Troubleshooting

Episode 133. Your Compressor Success Guide

Learn more about Refrigeration Mentor Customized Technical Training Programs at www.refrigerationmentor.com/courses

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In this episode, I'm sharing five things every refrigeration needs to develop to become a more proficient refrigeration professional and advance in your career. Many supermarket refrigeration technicians get stuck second-guessing, spending too long on calls, and relying on constant phone support from lead techs and managers, leading to callbacks and stress. These aren't just technical skills - they include asking better questions, knowing when and what to call about, building field learning habits, learning fundamentals and developing a mindset of constant review, reflection, and teaching.

In this episode, we cover:

(02:10) Pausing Before Reacting

(03:26) Reading Data Like a Pro

(04:11) Asking Better Questions

(07:21) Building Field Habits

(09:12) Knowing Setpoints and Baselines

(15:08) Refrigeration Fundamentals and Sequence

(17:47) Teaching and Reflecting On Your Work

Helpful Links & Resources:

Episode 349. How People Develop A "Refrigeration Mindset"

pisode 288. The Payoff of Investing Time & Money in Training with Jesse Stewart

Episode 274. The Biggest Key To Career Success in Refrigeration

Learn more about Refrigeration Mentor Customized Technical Training Programs at www.refrigerationmentor.com/courses

Join the Refrigeration Mentor Hub here

In this episode, we're breaking down key CO2 piping and installation practices. We cover essentials like correct trapping, suction line slope, proper hanger spacing and planning for expansion on long runs. We also discuss pipe material selection, brazing technique and purging, pressure testing requirements, and installation details across commercial and industrial applications.

In this episode, we cover:

(00:43) Why Piping in Refrigeration Matters

(02:12) Purging and Brazing Lessons

(03:49) CO2 vs HFC Piping Differences

(06:39) Traps Slopes and Supports

(10:58) Velocity Layout and Expansion

(12:45) Piping Material Codes and Alloys

(16:55) Pressure Testing and Compliance

(18:48) Oil Return Over Pressure Drop

(25:17) Piping Insulation Specs and Questions

Helpful Links & Resources:

Episode 74. Why Understanding Refrigeration Piping Design Is Critical

Episode 20. Refrigeration Piping...Who Knew

Episode 317. CO2 Piping Design (Tips to Protect Compressors and Prevent Failures) with Chris Griffiths

Learn more about Refrigeration Mentor Customized Technical Training Programs at www.refrigerationmentor.com/courses

Join the Refrigeration Mentor Hub here

In this conversation, we're talking supermarket case controllers with longtime refrigeration technician and Refrigeration Mentor Community Ambassador Andrew Freeburg. We cover why they're becoming more common (especially with CO2), and how they compare across brands like Danfoss, Copeland, CAREL, RDM and others. We also break down what case controllers do - running the case by controlling lights, fans, defrost, and electronic expansion valves - along with basic checks and troubleshooting tips to help refrigeration techs be more efficient and confident on service calls.

In this episode, we discuss:

(02:49) What Refrigeration Case Controllers Do

(04:09) Remote Access

(05:16) Key Case Controller Sensors and Relays

(07:25) Electronic Valve Types

(08:29 Sensor Verification

(10:00) Programming and Manuals

(14:17) Fine Tuning Case Controllers

Helpful Links & Resources:

Episode 257. CO2 Experts Live: Case Controllers with Kevin Mullis

Episode 261. Supermarket Case Controller Troubleshooting Tips

Episode 282. Danfoss CO2 Controllers with Dave Yoder

Learn more about Refrigeration Mentor Customized Technical Training Programs at www.refrigerationmentor.com/courses

Join the Refrigeration Mentor Hub here

In this conversation, we're joined by Refrigeration Mentor Community Ambassador Andrew Freeberg to discuss why we entered the refrigeration trade. On top of the strong pay potential, we uncover what we truly enjoy about the industry, including the daily variety, challenges, problem solving, helping customers and common misconceptions about on-call and working conditions. We also break down why many supermarket refrigeration technicians feel stuck second-guessing on jobs, which drives callbacks, stress, and constant support calls. This is an inspiring conversation for anyone considering getting into supermarket refrigeration or new techs looking to explore the sky high potential of the refrigeration industry.

In this episode, we discuss:

(03:14) Realities of On-Calls as a Tradesperson

(04:43) Payoff and Lifestyle of a Refrigeration Technician

(05:15) Why the Work Stays Fun

(06:29) Top Advantages of the Refrigeration Trade

(07:19) Advice for New Students

(08:16) Refrigeration Wages and Career Math

(10:33) Overtime

(12:12) Travel Anywhere With Skills

(15:47) Skills That Will Change Your Life

(19:24) Recruiting the Next Generation of Tradespeople

(21:34) Second Career Ageism

(25:03) Why Refrigeration Matters

(29:30) Trade School vs College

(30:56) Different Career Avenues in Refrigeration

Helpful Links & Resources:

Episode 333. Training and Troubleshooting Tips to Level Up Your Career

Episode 274. The Biggest Key To Career Success in Refrigeration

Episode 256. Career Tips for New Technicians

Learn more about Refrigeration Mentor Customized Technical Training Programs at www.refrigerationmentor.com/courses

Join the Refrigeration Mentor Hub here

In this episode, we're joined by Refrigeration Mentor Community Ambassador Andrew Freeburg to discuss how technicians can approach CO2 refrigeration with more confidence, reduce callbacks, and cut troubleshooting time with the right training and mentors. Andrew shares his journey in the trade, including push into CO2, emphasizing persistence, ongoing training, and being vocal with management about career goals. We also cover practical startup and commissioning fundamentals, including using P&IDs, wiring diagrams, I/O schedules, and checklists to identify components.

In this episode, we discuss:

(01:51) Andrew's CO2 Journey

(03:5)1 Learning CO2 Refrigeration Faster

(05:13) Refrigeration Startup Checklists

(05:44) Sensor Install Best Practices

(07:29) Advice for New Techs on CO2

(12:53) Commissioning and VFD Tuning

(15:32) Why Ongoing Commissioning Matters

(18:13) CO2 Monitoring and Troubleshooting

Helpful Links & Resources:

Episode 243. Step-By-Step Walkthrough of a CO2 Service Call with Patrick Gregory

Episode 227. Getting to Know Transcritical CO2 Supermarket Refrigeration Systems with Kevin Mullis

Episode 180: Developing your CO2 Knowledge into Experience

Learn more about Refrigeration Mentor Customized Technical Training Programs at www.refrigerationmentor.com/courses

Join the Refrigeration Mentor Hub here

In this episode, we're discussing why capable technicians often freeze when they walk into a supermarket rack room and how that hesitation drives long troubleshooting times, constant support calls, and callbacks. We'll talk about what causes overwhelm from complex rack systems, controls, and newer technologies like CO2, and the important fundamentals that are too often missed. Apprenticeships cover only a fraction of what techs need and that one-off training days aren't enough - the key is consistent, repeatable development paths and training to help technicians build rack specialist skills, reduce callbacks, and improve profitability.

In this episode, we cover:

(00:48) Why Techs Get Stumped on Service Calls

(01:48) Complexity Overload

(02:38) Apprenticeship Gaps for Tradespeople

(06:39) Refrigeration Glide

(07:17) Hot Gas Defrost

(13:32) Tips for Hiring New Refrigeration Techs

(16:22) CO2 Trend Graphs

(20:23) How to Build and Train Refrigeration Rack Specialists

Helpful Links & Resources:

Episode 299. Basic Refrigeration 101

Episode 251. Supermarket Refrigeration Service and Troubleshooting Tips

Episode 215. Understanding Refrigeration System Controls with Larry Herman of Redline Control Design

Learn more about Refrigeration Mentor Customized Technical Training Programs at www.refrigerationmentor.com/courses

Join the Refrigeration Mentor Hub here

In this conversation, we're talking with Aria Lucey, whose husband Aiden is a longtime technician and Refrigeration Mentor Community Ambassador, discussing how the demanding refrigeration lifestyle impacts relationships and family. She shares early long-distance relationship stories and long-hour challenges, the need for intentional connection, and the importance of clear, honest communication, rather than assumptions. Aria also shares strategies for handling disagreements, making repairs after conflict, and managing kids while incorporating the demanding, often unpredictable work schedule of a refrigeration technician.

In this episode, we cover:

(02:49) Long Distance Relationships

(05:37) Communication Strategies for Relationships

(08:18 Fights with Your Spouse

(10:17) Sharing Domestic Respinsibilities

(12:33) On-Call Lifestyle for Tradespeople

(14:35) Advice For New Relationships

(19:58) Balancing Sick Days

(25:03) Parental Leave And Family Planning

(26:29) Taking Turns Supporting Careers

(29:29) Dividing Household Responsibilities

(34:51) Explaining On-Call To Kids

(37:01) Advice For New Technicians

Helpful Links & Resources:

Episode 226. How Busy Technicians Can Better Manage Work and Family Life

Episode 208. The Personal and Professional Sides of Refrigeration (That You Won't Learn in School)

Episode 316. Strategies for Surviving and Thriving On-Call with Aidan Lucey

Learn more about Refrigeration Mentor Customized Technical Training Programs at www.refrigerationmentor.com/courses

Join the Refrigeration Mentor Hub here

In this conversation, I'm sharing the most important things technicians need to know to become experts at supermarket refrigeration. These include mastering the fundamentals like understanding the piping and instrumentation diagram (P&ID), wiring diagrams, IO schedules, and refrigeration schedules. I also discuss the process I use to help refrigeration technicians level up faster and become confident problem solvers, which in turn dramatically reduces troubleshooting time, cuts down on callbacks, and helps refrigeration techs approach service calls with a completely different mindset.

In this episode, we discuss:

(3:10) Diagnosing CO2 gas cooler pressure issues using trend graphs

(7:05) How technicians are learning to think differently

(11:20) Four key documents every refrigeration tech must understand

(16:15) Why data, trend graphs, and valve percentages reveal the real problem

(21:30) The problem with traditional training

(26:00) Continuous microlearning

(31:45) Strong troubleshooting fundamentals

(36:30) Building a global community of refrigeration technicians

(41:20) How to take on bigger CO2 and supermarket challenges

Helpful Links & Resources:

Episode 251. Supermarket Refrigeration Service and Troubleshooting Tips

Episode 299. Basic Refrigeration 101

Episode 332. 7 Transcritical CO2 Refrigeration Service & Maintenance Tips

Learn more about Refrigeration Mentor Customized Technical Training Programs at www.refrigerationmentor.com/courses

Join the Refrigeration Mentor Hub here

In this episode, we're breaking down how to prevent supermarket callbacks - and why the issue is rarely the rack itself. Callbacks crush margins, burn out technicians, frustrate service managers, and erode customer confidence. It comes down to diagnosing the root cause of issues, which almost always comes back to your process as a refrigeration technician: weak fundamentals, poor understanding of rack sequence of operation, misdiagnosis, and a lack of structured troubleshooting. We also discuss how structured development programs dramatically reduce callbacks, improve technician confidence, and increase gross margins for your company.

In this episode, we cover:

(02:45) The cost of refrigeration service callbacks

(05:30) Cause of most refrigeration service callbacks

(07:45) Weak fundamentals and missing rack sequence of operation steps

(10:10) The most common misdiagnoses in supermarket refrigeration

(13:20) Why control strategies matter

(16:40) The danger of being a "parts changer"

(19:30) How expert techs think differently

(23:30) How training reduces callbacks and grows better businesses

Helpful Links & Resources

Episode 350. Supermarket Refrigeration Tips and Tricks with Robert Ochs

Episode 306. Mastering Supermarket Service Calls with Andrew Freeburg

Episode 251. Supermarket Refrigeration Service and Troubleshooting Tips