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In this episode of CO2 Experts, we're joined by regular guest Andrew Freeburg to explain and provide real life examples of how to troubleshoot CO2 systems using trend graphs. Andrew shares some experiences and insights into reading and interpreting trend graphs, emphasizing the importance of fine-tuning systems and utilizing patience and observation to help technicians better troubleshoot issues more effectively and get systems running optimally. This episode was recorded live from the 2025 AHR Expo.

In this conversation, we cover:

-Understanding trend graphs

-How to find issues using trend graphs

-Making single adjustments and observing changes

-Fine-tuning CO2 refrigeration systems

-Defrost issues

-CO2 leak detection

Helpful Links & Resources:

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

Refrigeration Unlimited (RUI)