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International Comfort Products H8MPV050B12A1 Limit Switch
The limit switch is a switch in the heating area that determines when the heated air is warmed to a point to activate the main blower. The reason limit switches exist is because if the air is not warm enough the you will lose heat in the ducts and the vents will just blow cool air.
What are the signs that the limit switch is crapping out?
- The HVAC system starts to run erratically more often than not
- The HVAC system will not start or run well longer than 30 seconds
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