Carrier HK38EA022 Defrost Control Board
Quick Overview
The Carrier HK38EA022 Defrost Control Board regulates the heating cycle required to thaw ice build-up on the coils of an outside heat pump by checking the temperature and time intervals. The sensor triggers a reversal of the coolant flow and activates the outdoor fan motor to heat the coil when frost accumulation is detected by the sensor. This is an electronic component that is fitted inside the electrical control box of the outdoor condenser unit where it is connected to sensors contactors and the defrost heater. The circuit board makes use of built-in relays and logic circuits to read data on the freezing thermistor.
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