Gas and Oil Home Heating Furnaces - defrost problems /bryant hvac

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Gary T Lindsey
01-27-03, 12:09 PM
the coils on my unit are frosting over bad .the unit is a heat pump it still works but ice forms bad on coils. been told defrost timer or relay . please help. thanks: :confused:

bigjohn
01-27-03, 01:43 PM
Most likely it's a malfunctioning defrost board or coil temperature sensor. Most boards have some test pins that are used to fast forward the time and attempt to initiate a defrost. There may be instructions inside the pudoor unit on the inside of the cover that shows how to do it.