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International Comfort Products PGS048L120F Limit Switch
A limit switch was crafted because if the air never warms up 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 heat exchanger that decides if and when the air is warmed to a point to activate the main blower.
Clues to watch for to know limit switch needs a replacement ASAP
- The heating and cooling system will not begin the ignition sequence or continue to run longer than 10 minutes
- The system is beginning to become inconsistent on more than one occasion
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