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International Comfort Products N9MP1100F14A2 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. The limit switch contains a sensor in the heat exchanger that makes the determination when the air is warmed to a point for the blower to be activated.
Elements to watch for in a failing limit switch
- The HVAC system is starting to shut down unexpectedly more often than not
- The HVAC system will not begin the ignition sequence nor will it stay running like it is supposed to
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