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Lennox XP19-042 Defrost Sensor Board
The defrost sensor control board will determine when to initiate the defrost sequence which may be necessary to remove frost build-up that may accumulate. The defrost sensor board looks to a temperature sensor that can be found near the condenser, in order to ascertain when the defrost cycle should begin.
General indicators that your your defrost board is in dire straights
- The control board could throw an error code if the defrost board fails
- Defrosting does not run despite the fact that there is quite a bit frost on the outdoor unit
- The system will stop running due to the fact of way too much frost build-up
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