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Lennox 14ACX-036 Defrost Sensor Board
The defrost control board will begin the defrost sequence which helps to get rid of the frost that collects on the outdoor unit. The defrost sensor board is influenced by a defrost sensor located somewhere by the condenser to determine when the defrost cycle should begin.
Major indications of a weak outdoor defrost sensor board
- The system may stop operating because of frost blocking the airflow outside
- Self defrost sequence does not begin even though there is a lot of frost in the way
- The HVAC system control board may issue a particular error code produced when the defrost board is bad
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