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International Comfort Products PGMD24G0408 Limit Switch
The limit switch contains a sensor located in the furnace that makes the determination when the heated air is warmed to a point to activate the main blower. One big reason why limit switches are designed that way is because if the warmed air is too cool the you will lose heat in the ducts and the vents will just blow cool air.
Important signs limit switch should need replacing
- Your system is beginning to erratically on more than one occasion
- System will not initiate or run longer than 10 minutes
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