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International Comfort Products NBF100F20A1 Defrost Sensor Board
The defrost control board controls when to launch an important defrosting cycle in order to rid your unit of frost that can build up. The control board is relayed information from a defrost sensor located near the condenser to agree when the defrost cycle should begin.
Indications your outdoor defrost sensor board should need replacing
- Your system could stop working due in part to frost blocking the airflow outside
- The defrost sequence does not run especially when there is a rather large amount of frost on the external unit
- The main control board might issue an error of some type if the defrost board fails
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