Thermal Protection: Inherently manages current flow based on temperature to protect against electrical strain during frequent cycling

Direct OEM Matching: Replaces B1370772

The 40A rating applies to inductive loads like compressor motors

utilizing standard 3-wire leads for straightforward integration into existing rooftop units (RTU)

20 VA power supply

Carrier HK38EA023 Circuit Board 322838-752 Thermal Protection: Inherently manages currentThe Carrier HK38EA023 is a genuine OEM defrost control board designed for high performance Carrier, Bryant, and Payne heat pump systems. As a direct replacement for the obsolete HK38EA015, HK38EA010, and HK38EA008 models, this board provides the necessary logic to manage defrost cycle termination and outdoor fan operation. In cold weather conditions, the Carrier HK38EA023 monitors the outdoor coil temperature via the liquid line thermistor to prevent