HVAC Systems · Heat Pump Components
Defrost Control Board
Electronic control that manages the defrost cycle in heat pumps, preventing ice accumulation on the outdoor coil during heating operation.
Common uses
Defrost cycle control, ice prevention, heating efficiency
Common symptoms
- Ice buildup on coil
- Poor heating
- Continuous defrost
Common repairs
- Control board replacement
- Sensor service
- Timer adjustment
Related terms
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