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Carrier 58STA045 Defrost Sensor Board
The defrost sensor control board will determine when to initiate the defrost cycle which helps to keep the outdoor unit free from frost build-up. The defrost sensor board is relayed information from a sensor located in the outdoor unit to ascertain when the defrost cycle should begin.
Major clues your Carrier defrost sensor board needs to be replaced
- The system will not operate at all because of the amount of frost on the outdoor unit
- The defrost sequence never starts even though there is quite a bit frost that makes the unit run like crap
- Your main control board might issue a type of error code if the defrost board fails
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