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International Comfort Products HAC442AKA1 Defrost Sensor Board
The defrost sensor control board controls when to launch the defrosting phase which helps to remove frost build-up that may accumulate. The defrost sensor board is influenced by a defrost sensor located somewhere by the condenser to make the decision on when the defrost cycle should begin.
Subtle hints your defrost board is on its last leg
- The main board may throw an error code if the defrost board fails
- The defrost sequence does not begin even though there is quite a bit frost that makes the unit run like crap
- The HVAC system could cease to function at all because of the safety features installed
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