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International Comfort Products NTVM075GFA1 Limit Switch
The reason limit switches exist is due to the fact that if the air never warms up inside the exchanger the you will lose all the heat as the air flows through the ducts. The limit switch has a sensor in the heat exchanger that makes the determination when the air is actually warm enough for the main blower to kick in and circulate the air.
Signs of a weak limit switch
- The system is starting to ramp up but then stops more than once
- The heating and cooling system is unable to start or run well as it should
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