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Lennox 13ACD-048 Defrost Sensor Board
The defrost control board instructs the outdoor unit to begin the defrosting phase which may be necessary to get rid of the frost that collects on the outdoor unit. It looks to a specific sensor that can be found near the condenser, in order to ascertain when the defrost cycle should begin.
Major signs your outdoor defrost sensor board is not going to last much longer
- AC and heating system could cease to function at all because of the safety issue that the frost poses
- The control board may show an error code if the defrost control board fails
- Self defrost sequence never initiates despite that there is a large amount frost that has built up
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