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International Comfort Products NDN6100KFA1 Limit Switch
The limit switch has a sensor located in the furnace that makes the determination when the heated air is actually warm enough to activate the main blower. Limit switches are crucial because if the air is not warm enough then the house will never get warm enough.
Chief elements of a poorly performing limit switch
- Your system starts to behave differently occasionally
- The heating and AC system will not begin or run well for any significant length if time
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