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.

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Testo Gen 2 Smart Probes https://www.testo.com/en-US/products/smartprobes

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