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Lennox 13HPD-018 Defrost Sensor Board
The defrost control board commences the defrost cycle which may be needed in order to remove frost build-up that may accumulate. The defrost board relies on a temperature sensor which is near the condenser somewhere, in order to agree when to begin.
Major symptoms of a weak outdoor defrost sensor board
- Your HVAC system will not work at all because of the frost issue
- The defrost feature never kicks in even though there is excessive frost on the unit
- Your main control board might give out an error signal when encountering a problem
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