Join the Refrigeration Mentor Hub here

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

In this episode of CO2 Experts, we’re shifting from advanced technical concepts back to the foundational principles of CO2 refrigeration by diving into basic keywords and terminologies. We cover entropy diagrams, saturated lines, subcooling, and the critical point, as well as plotting system parameters to troubleshoot more effectively. We’ll also discuss differences between global terminologies and give refrigeration technicians practical tips for mastering transcritical CO2 refrigeration systems. 

In this episode, we cover:

-CO2 refrigeration keywords and terminologies

-The entropy diagram

-Saturated points and vapor states

-Flash gas and system dynamics

-Critical points and supercritical fluids

-CO2 safety

-Plotting and troubleshooting CO2 systems

-CO2 system design strategies

Helpful Links & Resources:

Episode 130: Decoding CO2 (R744) Phase Diagrams w/ James Seabrook & Parham Eslami Nejad

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

Episode 299. Basic Refrigeration 101

Episode 115: Understanding Compressors: What You Need To Know

Join the Refrigeration Mentor Hub here

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

This month marks the 3 year anniversary of the Refrigeration Mentor Podcast! To mark the milestone, we're re-releasing some of our top downloaded podcasts from the past 3 years, and we’ve reached number one. Originally released in May 2023, this episode remains one of our most popular ever, and I’ve received a ton of feedback from technicians about how this one really helped explain and clarify compressors. Thanks to all of you listening, learning and making an impact on the people you serve. Also, thanks for all your reviews and comments, which help people discover the podcast on all our platforms. The top episode on our countdown is Episode 115. “Understanding Compressors: What You Need To Know.” Video link and links to our entire top 5 countdown below.

In this episode, we cover:

-Types of mechanical issues

-Contamination

-Overheat

-Flooded starts

-Floodback prevention

-Slugging

-Scrolls & semis 

-Preventing repeat failures

-Oil loss

-Compressor check points

-Mobile apps

-Educational resources

Helpful Links & Resources:

Video of this webinar: https://youtu.be/QyK_3oNBZnk 

Episode 310. 3rd Anniversary Listener Favourite Countdown #2 (Episode 135. 15 Tips To Become a Great Service Technician)

Episode 309. 3rd Anniversary Listener Favourite Countdown #3 (Episode 203. Supermarket Refrigeration Service Tech Tips with Andrew Freeburg)

Episode 308. 3rd Anniversary Listener Favourite Countdown #4 (Episode 188. Compressor Secrets I Wish I Knew When I Started My Refrigeration Career)

Episode 307. 3rd Anniversary Listener Favourite Countdown #5 (Episode 113. 5 Tips on Developing a Growth Mindset)

Emerson Bulletins

Bitzer Spot App

Danfoss Ref Tools

Copeland Mobile

HVAC School

Join the Refrigeration Mentor Hub here

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

This month marks the 3 year anniversary of the Refrigeration Mentor Podcast! Thanks to all of you listening day in, day out, investing in yourself, getting to the next level in your career and making an impact on the people you serve. Also, thanks for all your reviews and comments, which helps us grow the podcast. To mark the anniversary, we're re-releasing some of our top downloaded podcasts from the past 3 years. We continue our countdown with Episode 135. 15 Tips To Become a Great Service Technician.

In this episode, we cover:

-Mastering technical skills

-Hands-on experience

-Problem-solving abilities

-Effective communication

-Customer service

-Efficient time management

-Continuous learning

-Certifications

-Safety

-Attention to detail

-Adaptability

-Professional appearance

-Ethical conduct

-Networking

Helpful Links & Resources:

Episode 309. 3rd Anniversary Listener Favourite Countdown #3 (Episode 203. Supermarket Refrigeration Service Tech Tips with Andrew Freeburg)

Episode 308. 3rd Anniversary Listener Favourite Countdown #4 (Episode 188. Compressor Secrets I Wish I Knew When I Started My Refrigeration Career)

Episode 307. 3rd Anniversary Listener Favourite Countdown #5 (Episode 113. 5 Tips on Developing a Growth Mindset)

Episode 228. Tips for Faster Service Calls & Better Time Management

Join the Refrigeration Mentor Hub here

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

This month we’re celebrating the 3 year anniversary of the Refrigeration Mentor Podcast by re-releasing some of our top downloaded podcasts from the past 3 years - ones you expressed how it changed your refrigeration career and your life. Thanks to all of you tuning in and for all your reviews and comments, which help people discover the podcast on all our platforms. And thanks for helping us build this Refrigeration Mentor community all over the world over these 3 years. Number 3 in our countdown is Episode 203. "Supermarket Refrigeration Service Tech Tips with Andrew Freeburg."

In this episode, we discuss:

-A step-by-step walkthrough of an efficient service call

-Importance of good communication with a customer

-Questions to ask a customer to assess a service call

-How to do an effective visual inspection

-Why to divide your tools into different sets

-Importance of understanding electrical circuits

-Providing highly detailed invoices to customers

-Understanding controls

-Not just repairing problems, but determining why the problem occurred

-Finding a mentor in the refrigeration trade

-Creating a service call checklist

Helpful resources & links:

Episode 308. 3rd Anniversary Listener Favourite Countdown #4 (Episode 188. Compressor Secrets I Wish I Knew When I Started My Refrigeration Career)

Episode 307. 3rd Anniversary Listener Favourite Countdown #5 (Episode 113. 5 Tips on Developing a Growth Mindset)

Episode 251. Supermarket Refrigeration Service and Troubleshooting Tips

Andrew Freeburg on LinkedIn

Join the Refrigeration Mentor Hub here

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

This month marks the 3 year anniversary of the Refrigeration Mentor Podcast! Thanks to all of you tuning in to help elevate yourselves and our industry, and for all your reviews and comments, which help people discover the podcast on all our platforms. To mark the anniversary, we're re-releasing some of our top downloaded podcasts from the past 3 years - ones you expressed how it changed your refrigeration career and your life. Number 4 in our countdown is Episode 188. Compressor Secrets I Wish I Knew When I Started My Refrigeration Career.

In this episode, we discuss:

-Compressor Troubleshooting

-Performance charts

-Compressor operation and maintenance

-Proper tools

-Scroll compressor mechanics

-Compression ratios

-Investigating compressor failures

-High and low evaporator pressures

-Handling high condensing temperatures

-Mass flow

-Super heat checks

Helpful Links & Resources:

Episode 307. 3rd Anniversary Listener Favourite Countdown #5 (Episode 113. 5 Tips on Developing a Growth Mindset)

(Original Release) Episode 188. Compressor Secrets (I Wish I Knew When I Started My Refrigeration Career)

Episode 133: Your Compressor Success Guide

Episode 115: Understanding Compressors: What You Need To Know

Episode 143: Advanced Compressor Service and Refrigeration Troubleshooting

Video: Dorin Two Stage Transcritical CO2 Compressor with Giacomo Pisano from Dorin Compressors

Bitzer: https://www.bitzer.de/ca/en/ 

Join the Refrigeration Mentor Hub here

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

 This month marks the 3 year anniversary of the Refrigeration Mentor Podcast! Firstly, thanks to all of you listening day in, day out, investing in yourself, getting to the next level in your career and making an impact on the people you serve. Also, thanks for all your reviews and comments, which help people discover the podcast on all our platforms. To mark the milestone, we're re-releasing some of our top downloaded podcasts from the past 3 years - ones you expressed how it changed your refrigeration career and your life. We’re starting off this countdown with Episode 113. “5 Tips on Developing a Growth Mindset” which was recorded during a live session at the NASRC CO2 event in California.

In this episode we discuss:

-Setting goals

-Developing habits

-Making a plan

-Taking action

-Believing in yourself

Helpful links & Resources:

(Original episode) Episode 113. 5 Tips on Developing a Growth Mindset

Episode 214. How to Develop the Right Mindset for Success

North American Sustainable Refrigeration Council (NASRC)

Book: Atomic Habits: An Easy & Proven Way to Build Good Habits & Break Bad Ones by James Clear 

Book: Limitless by Jim Kwik

Join the Refrigeration Mentor Hub here

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

In this conversation, we chat with Andrew Freeburg about effective strategies for tackling supermarket refrigeration service calls. Andrew shares insights from his nearly 20 years of experience and thousands of calls, including technical advice and the value of building relationships with customers. We also dive into avoiding common pitfalls technicians often face and tips for technicians to build confidence and tackle supermarket service calls faster and more effectively. 

In this episode, we discuss:

-Tips for building confidence on service calls

-Importance of communication in service calls

-Effective pre-call preparation

-Common mistakes on service calls

-Building relationships with customers

-New customers and stores

-Fixing the customer's problem

-Professionalism on calls

-Building trust with customers

-Handling service calls efficiently

Helpful Links & Resources:

Supermarket Service Call Workshop - May 24th, 2025 (sign up here)

Episode 300. The Power of Training and Development in Refrigeration with Andrew Freeburg

Episode 250. Service Call Stories and Troubleshooting Tips with Andrew Freeburg

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

Andrew Freeburg on LinkedIn

Join the Refrigeration Mentor Hub here

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

In this edition of CO2 Experts, we focus on electrical troubleshooting in CO2 refrigeration systems. Learn steps for navigating electrical diagrams, identifying key symbols, and understanding how different components work together. I share tips on effectively measuring voltage, interpreting wiring schematics, and troubleshooting common issues. Understanding the electrical makeup of a refrigeration system will help technicians identify problems faster and fix issues much more efficiently.

In this episode, we discuss:

-Understanding electrical symbols

-Reading electrical wiring diagrams

-Practical tips for technicians

-Advanced electrical concepts

-Electrical troubleshooting in refrigeration

-Time delay relays

-High pressure and temperature controls

-Relay functions and issues

-Temperature and pressure probes

Helpful links & Resources:

Episode 296. Electrical Troubleshooting in Refrigeration

Episode 246. CO2 Experts: Startup and Commissioning with Kevin Mullis

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

Episode 277. CO2 Experts: Pressure Relief Valves - Sizing, Selecting & Troubleshooting with Jordan Gronkowski

Join the Refrigeration Mentor Hub here

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

In this conversation, we welcome back Erik Holland, Aftersales Engineer with Advansor to dive into his unique journey from electrician to refrigeration expert. Eric has some great insights on understanding complex systems from his work traveling the world doing startups and teaching techs how to start their systems up and best utilize them. We also discuss computerized control systems, working with CO2 refrigeration, and drop tons of practical advice for refrigeration technicians looking to advance their careers.

In this episode, we discuss:

-From electrician to refrigeration expert

-Learning in the Field

-Understanding complex refrigeration systems

-Training and knowledge sharing

-Resourcefulness in remote locations

-Troubleshooting tips

-CO2 heat recovery and environmental considerations

-Safety measures in refrigerant handling

-Importance of proper training and equipment

-Embracing advanced refrigeration systems and technology

-Investing in training early in your career

Helpful Links & Resources:

Episode 265. CO2 Experts Live: Startup & Commissioning a CO2 Heat Pump with Erik Holland

Erik on LinkedIn

https://www.advansor.com/ 

Join the Refrigeration Mentor Hub here

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

In this conversation, we’re joined by Tony Mormino, host of HVAC TV to discuss content creation and using social media and online platforms to educate the industry. Tony shares his journey, starting from sales to becoming a content creator, and offers tips for those new to creating content. He also talks about about the importance of providing value, maintaining authenticity in your content, and how platforms like LinkedIn have evolved as a way to uplift the entire industry by providing education and valuable information to masses of people in a way we weren’t able to before. Have a listen and be sure to Tony’s socials and subscribe (links below).

In this episode, we discuss:

-The rise of online content

-Creating value through content

-The importance of personal branding

-The evolution of HVAC TV

-Content creation tips and challenges

-Learning and teaching in hvac

-Engaging with your online community

-Getting comfortable on camera

-Content creation strategies and inspiration

-Editing and video quality

-Using content to train and educate

-Advice for new content creators

Helpful Links & Resources:

HVAC TV on YouTube

Tony Mormino on LinkedIn

Episode 197. Filters to Followers - Mastering the Art of Social Media for Education with “The HVAC Doctor” Matt Waxer

Gary Vaynerchuk

Book: Think & Grow Rich by Napolean Hill