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Carrier 25HPA430A0030010 Limit Switch
Limit switches were created due to the fact that if the air never warms up inside the exchanger then you will never get hot air through the ducts. The limit switch is a type of sensor switch in the heating area that makes the determination when the heated air is warm enough for the air to begin normal home circulation.
Major indications of a failing critical limit switch
- The heating and cooling system will not begin or run even though the desired temperature has not been attained
- The system is beginning to behave erratically repeatedly
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