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International Comfort Products NDP6125KJB1 Limit Switch
The main reason limit switches are made is due to the fact that if the air never warms up inside the exchanger the you will lose heat in the ducts and the vents will just blow cool air. The limit switch is a switch in the heating area that senses, or governs, if and when the air is actually warm enough to activate the main blower.
Hints to watch for in a bad limit switch
- The heating and cooling system is unable to start or run longer than 30 seconds
- The system begins to initiate and then stops occasionally
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