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Carrier 58DLX09010016 Limit Switch
The reason limit switches exist is due to the fact that if the air inside the furnace is too cool the you will lose heat in the ducts and the vents will just blow cool air. A normal limit switch contains a sensor in the air handler that makes the determination when the heated air is actually warm enough for the main blower to kick in and circulate the air.
Some warnings limit type switch is on its last leg
- The whole system is beginning to shut down unexpectedly occasionally
- The heating and AC system refuses to start or run for any significant length if time
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