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Whynter ARC-143MX Defrost Sensor Board
The defrost sensor control board commences the defrost cycle which helps to get rid of the frost that collects on the outdoor unit. The board looks to a defrost sensor that can be found near the condenser, in order to decide when to initiate the defrosting cycle.
Easy warnings to watch for in a failing Whynter defrost sensor board
- The system will cease to operate at all because of too much frost
- The control board might issue an alphanumeric error code referring to a bad defrost board
- The defrost sequence does not begin even though there is quite a bit frost in the way
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