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Payne PA13NR030000AAAA Limit Switch
Limit switches exist because if the warmed air is too cool then you will never get hot air through the ducts. A normal limit switch is a type of sensor switch in the air handler that decides when the heated air is warmed to a point that it can be circulated throughout the house.
Main clues limit switch is in dire need of a replacement
- The heating and cooling system will not begin the ignition sequence or will not stay running like it should
- The whole system starts to run erratically time after time
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