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Whirlpool ATR1545SPP0 Defrost Sensor Board
The defrost sensor board commences the defrosting phase if necessary, to keep your outdoor unit from plugging up. The defrost board looks to a temperature sensor located somewhere by the condenser to agree when the defrost cycle should begin.
What warnings are present when my Whirlpool defrost sensor board needs replacing?
- Your HVAC system will not operate at all because of frost blocking the fins on the outside unit
- Defrost session never starts even though there is excessive frost that needs to be removed
- The main circuit board could display an error of some type produced when the defrost board is bad
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