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International Comfort Products PGMD47H135A Defrost Sensor Board
The defrost control board controls if and when to commence the defrost cycle in order to remove frost build-up that may accumulate. The control board is relayed information from a defrost sensor located somewhere by the condenser to decide when the defrost cycle should begin.
Chief elements of a failing AC defrost sensor board
- The defrost sequence has not run for quite some time especially when there is frost built up
- The system may end up not running due to lack of airflow through the outdoor unit
- The main circuit board may signify an error number if the defrost board fails
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