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International Comfort Products NTPM075GFA1 Defrost Sensor Board
The defrost sensor control board determines when or if to start the defrosting phase which may be necessary to keep your outdoor unit from plugging up. The defrost board looks to a sensor that can be found near the condenser, in order to make the decision on when the defrost cycle should begin.
Major indications of an ineffective defrost board
- The defrost feature refuses to initiate especially when there is a rather large amount of frost on the external unit
- The main board could throw an error of some type produced when the defrost board is bad
- The AC may cease to function due in part to lack of airflow through the outdoor unit
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