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Carrier 38EYA048 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. A normal limit switch is a switch located in the furnace that makes the determination when the heated air is warm enough to activate the main blower.
What symptoms are present when the limit type switch really is on its last leg?
- The heating and cooling system will not begin the ignition sequence or run well longer than 10 minutes
- The whole system is starting to become unpredictable repeatedly
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