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Heat Controller VMH18SC-1 Limit Switch
A limit switch was crafted because if the air is not warm enough the you will lose heat in the ducts and the vents will just blow cool air. The limit switch contains a sensor in the air handler that makes the determination when the air is warm enough to activate the main blower.
What are the signs that the limit switch most likely is almost dead?
- Your system is starting to erratically on a regular basis
- System refuses to start or run longer than 10 minutes
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