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Payne PA13NR042000AAAA Limit Switch
The limit switch has a sensor in the air handler that determines when the air is warmed to a point for the air to begin normal home circulation. Limit switches are crucial because if the air is too cool inside the furnace to begin with, then you will never get hot air through the ducts.
Main clues limit switch is dying
- The heating and cooling system will not begin the ignition sequence or continue to run for any significant length if time
- The system starts to act differently more often than not
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