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Edgestar AP14001HS Limit Switch
The limit switch has a sensor in the heating area that decides if and when the air is warmed to a point that it can be circulated throughout the house. The reason limit switches exist is because if the air is too cool inside the furnace to begin with, the you will lose heat in the ducts and the vents will just blow cool air.
Hints of a dying main limit switch
- System is unable to start or will not stay running longer than a minute
- The whole system is beginning to runs spotty frequently
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