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Carrier 50HEQ006 Defrost Sensor Board
The defrost control board determines when or if to start the defrost cycle which assists to continue normal heating and cooling operations. The board depends on a temperature sensor which is near the condenser somewhere, in order to make the decision on when the defrost cycle should begin.
Symptoms the defrost sensor board has little life left
- The primary control board could display an error code referring to the failed defrost sequence
- The AC may cease to operate at all because of frost blocking the airflow outside
- The defrost sequence refuses to run even though there is quite a bit frost in the way
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