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International Comfort Products H8MPN075F16A1 Limit Switch
The main reason limit switches are made is because if the warmed air is too cool the you will lose heat in the ducts and the vents will just blow cool air. A normal limit switch is a switch in the heating area that makes the determination if and when the air is actually warm enough to activate the main blower.
Major indications to watch for in a bad limit type switch
- System will not start or continue to run as it should
- The whole system is starting to shut down unexpectedly frequently
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