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Carrier 48GX048115300 Defrost Sensor Board
The defrost sensor board initiates the defrost sequence if necessary, to continue normal heating and cooling operations. The board relies on a sensor located in the outdoor unit to ascertain when to begin.
General warnings to watch for in a bad defrost sensor board
- The main circuit board may issue an error number if the defrost board goes out
- Self defrost sequence never kicks in despite the fact that there is quite a bit frost that has built up
- The AC may end up not running due to frost blocking the airflow outside
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