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

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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

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 Ambassadors Andrew Freeburg and Erik Holland ot share some call stories from the field, including a severely overheated semi-hermetic compressor teardown. We also walk through safely isolating, recovering, and cleaning or replacing TXV screens/strainers and also common refrigerated case freeze-up causes and defrost strategy. Interested in joining the next Refrigeration Mentor Community Meetup? Click here.

In this episode, we cover:

(01:56) Copper Plating Moisture Clues

(04:32) Oil Color And System Cleanup

(08:05) Pumpdown And Screen Cleaning

(10:56) Case Freeze Up Root Causes

(14:07) Suction Liquid Line Routing Fix

(16:12) Airflow Blockage Issues

(16:43) Coil Gaps and Bypass

(19:00) Defrost Strategy Breakdown

(21:05) Humidity and Data Trends

(23:19) What Not to Adjust First

(24:34) Wild Leg Voltage Explained

(27:20) Safety Metering Lessons

Helpful Links & Resources:

Episode 365. Compressor Inspections and Troubleshooting Stories from the Field

Episode 329. The Ins & Outs of Compressors

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

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

Join the Refrigeration Mentor Hub here

This conversation was from our latest Refrigeration Mentor Community Meetup, talking about refrigeration controls and electrical systems with Andrew Freeburg and Erik Holland. We cover control fundamentals such as transformers, multiplex board setup, communication basics, polarity, baud rate, cable practices, and fail-safe settings for loads. We also discuss how to build confidence through competence - studying, repetition, applying skills on real systems, asking questions, using community support, setting goals, and learning by teaching. Interested in joining the next Refrigeration Mentor Community Meetup? Click here.

In this episode, we discuss:

(00:30) Confidence and Competence

(06:02) Learning How to Learn

(09:58) Setting Goals and Support Groups

(15:42) Dunning Kruger Effect

(21:58) Electrical Basics and Safety

(22:21) Center Tap Transformers

(24:30) Multiplex Boards and Dip Switches

(25:59) Binary Addressing Switches

(26:37) Power and Comms Terminals

(27:11) Comms Voltage and LEDs

(29:40) Wiring Noise and Shielding

(30:47) Fail Safe Dip Switches

(33:46) Analog Inputs and Outputs

(34:54) Software vs Hardware Logic

(39:06) Panel Safety Basics

(43:30) Meter Testing and Ratings

(47:47) Electrical Safety Mindset

Helpful Links & Resources:

Episode 371. A 6-Step Process for Faster Electrical Troubleshooting

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 episode, we're talking with Rob Ochs of Recold to unpack his long and successful refrigeration career - from rack refrigeration, to global sales and adiabatic coolers. He shrares practical tips for technicians and engineers working with modern systems, including CO2. Rob also covers career lessons, communication advice and troubleshooting tips for technicians to help reduce callbacks and make smarter equipment decisions. This episode was recorded live at the 2026 AHR Expo.

(0:40) Rob Ochs' Career Path

(2:09) Navigating Career Transitions in Refrigeration

(5:49) Why Refrigeration Techs Should Learn Design

(10:29) Condenser and Gas Cooler Sizing 101

(14:34) Nameplates, Rack Summaries, and Finding Mismatches

(20:17) Critical Charge vs DX

(22:52) Finding Mentors

(24:06) Condenser Fan Strategies

(29:11) Latent Gas Defrost Explained

(33:36) Adiabatic vs Air Gas Coolers

(39:44) Pad Efficiency and Seasonal Pad Removal

Helpful Links & Resources:

Follow Robert on LinkedIn

Recold

AHR Expo

Episode 350. Supermarket Refrigeration Tips and Tricks with Robert Ochs

Episode 271. The Inspiring Refrigeration Journey of Robert Ochs

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 talking about commercial refrigeration trends and technician realities in the UK/Europe versus North America with UK-based Refrigeration Consultant, Brian Churchyard. We cover the transition to CO2 transcritical, as well as skilled-trades shortages, wage and workload pressures, and the need for continual upskilling across service, maintenance, design, installation, and commissioning sectors of refrigeration. Brian also shares some hands-on fundamentals and things for new technicians to be excited about. This episode was recorded live at the 2026 AHR Expo.

In this episode, we discuss:

(0:51) Brian's Journey: From Service Engineer to Supermarket Head of Engineering

(3:30) Refrigeration Trends in Europe

(6:01) A2L Safety, Flammability Context & Design Risk Mitigation

(10:48) Upskilling for the Low-Carbon Transition

(11:24) The Skilled Trades Shortage

(14:55) Pay, Workload & Market Pressures

(17:03) Attracting New Refrigeration Professionals

(18:54) Building Strong Refrigeration Techs Faster

(20:06) Customer Relationships and Clear Communication

(22:54) Refrigeration Controls

(23:33) Omega Solutions Now Data

(31:08) Refrigeration Industry Outlook

(34:27) Advice for New Refrigeration Technicians

Helpful Links & Resources:

Omega Solutions Now Data

Episode 374. Growing the Refrigeration Industry Globally with World Refrigeration Day Founder, Steve Gill

Episode 285. CO2 Experts: Transitioning to CO2 as a Service Technician Q & A with Andrew Freeburg

Episode 340. Basics of CO2 Controls with Kevin Mullis (Part 1 of 4)