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Haier CPR10XC9-L Defrost Sensor Board
The defrost sensor board is jobbed with determining when to begin the defrost cycle which may be necessary to remove frost build-up that may accumulate. The defrost board is relayed information from a sensor located somewhere by the condenser to make the decision on when to begin.
Major clues of a declining outdoor defrost sensor board
- AC and heating system could stop functioning due to the fact of too much frost
- The HVAC system control board might give out an error code referring to the failed defrost sequence
- Unit defrost session never runs despite the fact that there is a lot of frost on the external unit
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