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International Comfort Products NDP6100HFA1 Defrost Sensor Board
The defrost sensor board determines when to initiate the defrosting phase which aids to keep the outdoor unit free from frost build-up. It depends on a temperature sensor which is near the condenser somewhere, in order to decide when to begin.
Some warnings the AC defrost sensor board will need replacing
- Defrost mode never kicks in especially when there is frost that makes the unit run like crap
- The main circuit board may throw a particular error code if the defrost board fails
- Your system could cease to function due in part to frost blocking the fins on the outside unit
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