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International Comfort Products H9MPV125L20B1 Limit Switch
Limit switches were created 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. The limit switch is a type of sensor switch in the heating area that makes the determination if and when the air is warmed to a point that it can be circulated throughout the house.
Major clues main limit switch has to be replaced
- The HVAC system will not begin or run longer than 30 seconds
- The HVAC system is starting to act weird time after time
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