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Carrier 58MSA12012120 Defrost Sensor Board
The defrost control board will determine when to initiate the defrost cycle in order to get rid of the frost that collects on the outdoor unit. The board is influenced by a specific sensor located near the condenser to verify when the defrost cycle should begin.
Hints your defrost board is dying
- Defrost session does not begin especially when there is frost on the outdoor unit
- Your main control board might issue an alphanumeric error code produced by too much frost
- The HVAC system could not run due to the frost blocking the flow of air
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