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International Comfort Products NDC7125BKA1 Limit Switch
The limit switch is a type of sensor switch located in the furnace that determines when the heated air is actually warm enough so that it may be pushed through the ducts and out the vents. A limit switch was crafted 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.
Indications of an ailing limit type switch
- System will not start or continue to run for any significant length if time
- The system is starting to runs spotty repeatedly
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