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How this Defrost Control Board Works, Heat Pump Wiring for Defrost Cycle!

In this HVAC video, I go over how the Heat pump defrosts control board works, how to wire each terminal on the board, what happens during defrost mode, the voltage paths, and the sequence of operation in depth. I explain how to test the defrost cycle on the board and how this board differs from others. I show you how to connect the thermostat wire connectors to the heat pump. How to know if your heat pump defrosts board is working properly so that it won't freeze up.

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