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International Comfort Products HHP042AKA1 Defrost Sensor Board
The defrost sensor board initiates the defrost cycle in order to continue normal heating and cooling operations. The control board looks to a temperature sensor located somewhere by the condenser to agree when the defrost cycle should begin.
Some clues your outdoor defrost sensor board will need to be replaced
- The main circuit board may issue an error of some type referring to a failing defrost control board
- Defrosting never runs especially when there is a rather large amount of frost built up
- Your HVAC system will stop operating at all because of frost blocking the airflow outside
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