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Whirlpool ATE1542BPP0 Limit Switch
The main reason limit switches are made 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. The limit switch is a switch in the heat exchanger that makes the determination if and when the air is warmed to a point so that it may be pushed through the ducts and out the vents.
Major signs main limit switch should be replaced
- The system starts to go through the startup sequence but stops quickly time after time
- System will not even start nor will it stay running for any significant length if time
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