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Is troubleshooting and replace a defrost sensor and/or a defrost circuit board a DIY project?
Forum Members, I have a 12-year-old Bryant / Carrier / Model 25HBC336W0030010 heat pump that was given a clean bill of health last October by HVAC repair company A. Monday night, it frosted/froze up and Tuesday morning, a tech from HVAC repair company B said the refrigerant level was fine but...