How to Diagnose a Faulty Defrost Control Board on a Heat Pump

Follow along with Tim Smith as he demonstrates the proper procedure for troubleshooting a faulty defrost board on a heat pump.

Is the thermostat calling for heat?
Which loads are operating?
Is the current passing through one of the black wires, connected to the heater, measuring 30A?
Is there frost on the outdoor coil?
Are there any loose wires at the contactor or the defrost control board?

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How to Diagnose a Faulty Defrost Control Board on a Heat Pump howard johnson ezeiza
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How-to & Style	Upload TimePublished on 2 Mar 2019

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