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International Comfort Products T9MPX060F12A2 Limit Switch
The limit switch is a switch in the air handler that determines if and when the air is actually warm enough to activate the main blower. This is important due to the fact that if the air inside the furnace is too cool the you will lose heat in the ducts and the vents will just blow cool air.
Major symptoms limit switch needs replacing
- The whole system is starting to behave erratically frequently
- The heating and cooling system will not even start or will not stay running longer than 30 seconds
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