Commercial HVAC Call/ Thermal Expansion Valve Stuck Open

During this commercial HVAC service call, I found a dead condenser fan motor, noisy refrigerant pipe and a stuck open/hunting thermal expansion valve. I used the gen 2 Testo Smart Probes and Smart Probes app to diagnose the problem. Best in Trade

Save 8% at using promo code knowitall
Save on Testo Products at TruTech Tools with this link

Testo Gen 2 Smart Probes

Listen to the HVAC Know It All Podcast

Visit for articles, tips and tool reviews