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International Comfort Products C9MPD075F12B1 Limit Switch
A limit switch was crafted because if the air is too cool inside the furnace to begin with, the you will lose all the heat as the air flows through the ducts. A normal limit switch is a switch in the heat exchanger that decides if and when the air is warm enough for the main blower to kick in and circulate the air.
Hints of a deteriorating limit switch
- The heating and cooling system will not even start or will not stay running longer than 10 minutes
- The whole system starts to stop suddenly repeatedly
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