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International Comfort Products PGF048S120F Defrost Sensor Board
The defrost sensor control board is jobbed with determining when to begin the defrost cycle which may be necessary to continue normal heating and cooling operations. The control board relies on a specific sensor located in the outdoor unit to verify when to initiate the defrosting cycle.
Major signs the defrost sensor board is going to die
- The defrost feature has not run for a while despite the fact that there is a lot of frost on the unit
- AC and heating system could not operate due in part to lack of airflow through the outdoor unit
- The control board could throw an error number referring to a bad defrost board
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