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Whirlpool ATR1552SPP0 Defrost Sensor Board
The defrost sensor control board instructs the outdoor unit to begin the defrost cycle which may be needed in order to keep your outdoor unit from plugging up. The defrost board is relayed information from a sensor located somewhere by the condenser to make the decision on when the defrost cycle should begin.
Symptoms of a deteriorating defrost board
- Most systems will stop functioning due to the fact of the amount of frost on the outdoor unit
- Defrost mode never runs even though there is quite a bit frost in the way
- The main circuit board could signify a specific error code when a defrost board fails to initialize
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