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Nordyne MS3BA042KA Defrost Sensor Board
The defrost sensor board controls if and when to commence the defrost sequence which aids to get rid of the frost that collects on the outdoor unit. The defrost sensor board relies on a specific sensor which is near the condenser somewhere, in order to decide when the defrost cycle should begin.
Signals the AC defrost sensor board has very little life left
- Unit defrost session never runs even though there is a lot of frost on the external unit
- Your HVAC system will end up not running for the simple fact of frost blocking the airflow outside
- The control board might issue an alphanumeric error code referring to the failed defrost sequence
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