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Haier CPN12XH9-E Defrost Sensor Board
The defrost sensor board will begin an important defrosting cycle which aids to keep your outdoor unit from plugging up. The control board depends on a temperature sensor located somewhere by the condenser to verify when to initiate the defrosting cycle.
Indications your defrost board is in dire straights
- Your main control board might issue a particular error code produced when the defrost control board fails to receive a signal
- The HVAC system could stop functioning because of the safety issue that the frost poses
- Defrosting does not run even though there is a large amount of frost on the external unit
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