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Carrier 58STX09010016 Limit Switch
A normal limit switch contains a sensor in the heat exchanger that decides if and when the air is actually warm enough for the main blower to kick in and circulate the air. A limit switch was crafted 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.
Signs limit switch has very little life left
- The HVAC system is starting to behave differently more often than not
- System refuses to kick in or run well even though max temp has not been reached
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