Join the Refrigeration Mentor Hub here

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

In this episode, we're talking about installation prep for CO2 refrigeration. I'm joined by longtime refrigeration technician and Refrigeration Mentor Community Ambassador Andrew Freeburg to discuss CO2 system installation, design, evacuation, and pressure testing, diving into best practices and common challenges. This episode provides valuable tips for refrigeration technicians looking to expand their knowledge and expertise in handling CO2 systems. This episode was recorded live during one of our regular Refrigeration Mentor Community Meetups. Join the next meetup here.

In this episode, we cover:

(1:37) Dealing with Pain and Injuries on the Job

(8:06) Training Apprentices Effectively

(16:33) Insights from the HR Show

(17:50) CO2 System Design and Installation

(34:24) Understanding Pressure Ratings and Conversions

(35:40) Installation Prep for CO2 Systems

(36:24) Proper Support and Slope for Piping

(38:15) Brazing and Nitrogen Purging

(38:48) Setting Cases and Proper Installation Practices

(40:06) Following Manufacturer Specifications

(41:57) Expansion Loops and Traps

(51:42) Pressure Testing Procedures

(57:29) Triple Evacuation and Deep Vacuum

Helpful Links & Resources:

Episode 160: Things to Know When Installing and Servicing CO2 Refrigeration Systems

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

Episode 81. Challenges Faced When Installing CO2 Systems

Join the Refrigeration Mentor Hub here

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

In this episode, we're talking with technician Aidan Lucey about neurodiversity in the refrigeration industry - discussing ADHD (attention-deficit/hyperactivity disorder) and its prevalence among technicians. Aiden, a Refrigeration Mentor Community Ambassador, shares personal experiences with hyperfocus, recognizing neurodiverse traits in himself and others, and how it impacts technicians' job performance and mental health. We also cover the importance of setting boundaries, the benefits of exercise, and effective communication within teams when it comes to balancing neurodiversity and a healthy, thriving work life.

In this episode, we cover:

(0:19) Neurodiversity and ADHD in Refrigeration

(0:47) Aidan's Personal Experiences with ADHD

(7:13) Impact of Neurodiversity on Relationships and Communication

(10:33) Mentoring and Empathy in the The Trades

(14:58) Challenges and Mindset Shifts Regarding ADHD and Neurodiversity

(17:54) Generational Differences in the Workforce

(18:40) Neurodiversity and ADHD Career Success Stories

(21:13) Maximizing Earnings and Career Growth In The Trades

(25:03) Importance of Electrical Knowledge

(27:54) Patience and Problem-Solving In The Skilled Trades

Helpful Links & Resources

Episode 167: Why Mentors Play a Key Role in Your Refrigeration Journey with Bill Zoren Key Mechanical

Episode 125: Next Generation Leadership and Management for HVACR Professionals w/ James Bailey

Join the Refrigeration Mentor Hub here

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

In this episode, you'll learn important electrical troubleshooting techniques that help you stop guessing and start proving in diagnosing electrical issues in refrigeration systems. We'll explain the significance of understanding power and control circuits, how to effectively read diagrams, and the essential measurement techniques across components. We also cover common issues like block power and failed loads, and discover a six-step repeatable method for efficient troubleshooting. This episode is packed with valuable tips for technicians to better understand refrigeration electrical systems and feel more confident on service calls.

In this episode, we discuss:

(0:37) Understanding Circuits in Refrigeration Systems

(1:57) Diagnosing Refrigeration Electrical Problems

(2:27) Effective Troubleshooting Techniques

(5:00) Reading and Interpreting Electrical Wiring Diagrams

(9:26) Common Mistakes and Misunderstandings

(10:52) Six-Step Troubleshooting Process

Helpful Links & Resources:

Episode 323. Electrical Troubleshooting 101

Episode 305. CO2 Experts: Electrical Troubleshooting

Episode 296. Electrical Troubleshooting in Refrigeration

Join the Refrigeration Mentor Hub here

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

In this episode, we're talking with Billy Carlson of Carlson Heating and Air Conditioning about his personal story and career path. Billy shares his experience and reflections on the refrigeration industry, including tips for training new technicians. We cover key topics such as the challenges of rack refrigeration, the transition to CO2 systems, the importance of manufacturer support, and the dynamics of training technicians. We also discuss practical aspects like handling dry ice, system startups, and the impact of new technologies like ejectors. This episode was recorded live at the 2026 HVAC/R Training Symposium.

In this conversation, we cover:

(0:20) Billy Carlson's Journey in Refrigeration

(1:56) Challenges and Learning in Supermarket Refrigeration

(2:54) Transitioning to CO2 Refrigeration Systems

(12:26) Training and Mentorship in Refrigeration

(18:55) E2 Settings

(19:49) Trend Graphs and CO2 Refrigeration Systems

(21:09) Cold Weather Challenges

(22:47) Insulation and Roof Design

(28:22) Advice for New Refrigeration Technicians

Helpful Links & Resources:

HVAC/R Training Symposium

Episode 72. Why You Need To Head To Events Like The HVACR Training Symposium

Episode 237. Tips for New Technicians Getting Into Supermarket Refrigeration with Aidan Lucey

Episode 350. Supermarket Refrigeration Tips and Tricks with Robert Ochs

Join the Refrigeration Mentor Hub here

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

In this episode, we're talking about the critical mindset shift required for working with CO2 refrigeration systems. This is especially important for technicians with apprehensions transitioning from HFC systems, to help you become more confident working with CO2 refrigeration systems. This episode covers handling high-pressure environments, essential tools, and practical advice that will help all refrigeration technicians become experts in CO2 refrigeration. The more you understand the fundamentals of CO2 refrigeration, how to prioritize safety, and learn to navigate the complexities of CO2 systems, the more you'll embrace the growing prominence and extraordinary benefits of CO2 refrigeration.

In this episode, we discuss:

(0:06) The CO2 Refrigeration Mindset Shift

(0:54) Challenges and Safety in CO2 Refrigeration Systems

(4:24) Efficiency and Environmental Impact of CO2

(6:25) Understanding Superheat and Tools for CO2

(9:34) Fundamentals and Training for CO2 Refrigeration

(11:34) CO2 Refrigeration Troubleshooting Tips

(14:18) The Importance of Continuous Learning In The Trades

Helpful Links & Resources:

Episode 312. CO2 Experts: Basic Terminology & Keywords

Episode 283. CO2 Experts: The Shift from HFCs to CO2 - Lessons Challenges and Solutions with Conor Eaton-Smith

Episode 201. Removing the Fear of CO2 Refrigeration with Andrew Freeburg

Join the Refrigeration Mentor Hub here

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

In this episode, we're going into the fundamentals of electrical troubleshooting for refrigeration systems. Building a solid foundation in electrical work will help technicians succeed in the field and troubleshoot far more efficiently. I'll share a repeatable six-step process to tackle electrical issues which will help you better understand the logic behind wiring diagrams - which will completely reframe how you tackle electrical issues out on your service calls.

In this episode, we cover:

(3:34) Understanding Refrigeration Electrical Components

(5:07) 6-Step Electrical Troubleshooting Process

(9:21) Importance of Ground Troubleshooting

(11:40) Refrigeration industry Events

Helpful Links & Resources:

Episode 323. Electrical Troubleshooting 101

Episode 296. Electrical Troubleshooting in Refrigeration

Episode 12. You Need To Know About Refrigeration Compressor Electrical Issues

AHR Expo

Join the Refrigeration Mentor Hub here

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

In this episode, we're walking you through how refrigeration technicians can transition into leadership roles with Ben Boyer of The Arcticom Group. Ben covers the mindset shifts, skills development, and practical steps necessary for career advancement and shares personal anecdotes and essential advice on building confidence, conscious leadership, handling emotional responses, and continuous learning. This episode is packed with guidance and inspiration for any refrigeration technician looking to advance into a management or leadership role.

In this episode, we discuss:

(1:36) How to transitioning to a leadership roles

(5:12) Handling emotions in leadership

(9:49) How to ask for a promotion

(20:43) Overcoming fear of public speaking

(26:09) Personal development for tradespeople

(36:37) How to build relationships with dispatch

Helpful Links & Resources:

Episode 286. Leadership Training for Technicians with Jim Pape of The Arcticom Group

Episode 125: Next Generation Leadership and Management for HVACR Professionals w/ James Bailey

Episode 187: Making The Leap From Technician To Service Manager - Learning Leadership Skills with Scott Farley of The Arcticom Group

The Arcticom Group

Join the Refrigeration Mentor Hub here

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

In this episode, we're talking about electrical troubleshooting. This topic comes up so often in our training programs and it's one that challenges both new and experienced refrigeration technicians. Here, we cover everything from proper voltage, to reading and understanding manuals, and tips for using systematic approaches to solve problems. We also discuss proper calculation of refrigerant charge, electrical safety measures and how to be more efficient in the field.

In this episode, we cover:

(0:04) Refrigeration Electrical Troubleshooting Basics (3:24) Understanding Refrigeration Wiring Diagrams (7:20) Electrical Safety (14:09) Resourcefulness in the Field

Helpful Links & Resources:

VIDEO: Electrical Troubleshooting 101: How to Diagnose & Fix Refrigeration Problems Like a Pro

Episode 259. CO2 Experts Live: Electrical Troubleshooting with Rusty Walker

Episode 327. Electrical Troubleshooting Strategy

Join the Refrigeration Mentor Hub here

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

This episode is another of our live "Morning Coffee" sessions inside our Refrigeration Mentor Community with longtime refrigeration technician, Andrew Freeburg and fellow refrigeration prefessionals. This discussion covers a variety of technical topics including inspecting compressors, proper sensor placement and insulation, particularly for gas cooler outlet sensors, as well as diagnosing system issues such as liquid line frosting due to low refrigerant charge. Interested in joining the next meetup live? Join our FREE Refrigeration Mentor Community today.

In this episode, we cover:

(1:57) Importance of Asking Questions (8:49 Refrigeration Compressor Maintenance (20:57) CO2 Refrigeration System Best Practices (25:07) Importance of Accurate Sensor Readings (26:16) Sensor Placement and Insulation Guidelines (27:42) Manufacturer Recommendations and Testing (29:18) CO2 Refrigeration in Supermarkets and Industrial Settings (30:33) Troubleshooting Frosted Liquid Lines (35:02) Understanding Thermodynamics in Refrigeration (45:45) Community Knowledge Sharing and Training

Helpful Links & Resources:

VIDEO: Scroll Compressor Teardown: What to Watch For

VIDEO: Troubleshooting CO2 Gas Coolers with BAC Part 1: Sensors, ECM Fans, Water Issues & Setup Tips

Episode 17. Troubleshooting the Gas Cooler of a Transcritical CO2 Refrigeration System with Lars Hørup Jensen

Episode 133. Your Compressor Success Guide

Join the Refrigeration Mentor Hub here

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

This episode is another of our "Morning Coffee" sessions inside our Refrigeration Mentor Community with longtime refrigeration professionals Andrew Freeburg and Erik Holland, discussing challenges and solutions for the refrigeration workforce. We share experiences and insights into technician shortages, training new technicians, and the evolving landscape of refrigeration. We also get into a technical deep dive on oil analysis, detailing how to read lab reports, assess moisture, contaminants, and acidity in refrigeration systems. Interested in joining the next meetup live? Join our FREE Refrigeration Mentor Community today.

In this episode, we discuss:

(0:38) Challenges in the Refrigeration Industry (1:12) Importance of Mentorship in the Trades (6:15) Global Perspectives on Refrigeration (12:01) Hands-On Refrigeration Troubleshooting Tips (18:30) Safety and Efficiency in Refrigeration (22:41) Career Opportunities in Refrigeration (30:46) Understanding Oils in Compressors (32:35) Moisture Control in Refrigeration (36:52) Analyzing Oil Samples (46:40) Dealing with High Acidity Levels (51:24) Practical Advice for Technicians

Helpful Links & Resources:

Episode 363. A Look Ahead to 2026 in Refrigeration

Episode 112: Refrigeration Workforce Development and CO2 Training w/NASRC

Episode 085: Generation Z with love2hvac

RENISO