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Carrier 50XT-A24 Limit Switch
One big reason why limit switches are designed that way is due to the fact that if the air inside the furnace is too cool then you will never get hot air through the ducts. The limit switch is a type of sensor switch in the heating area that determines when the air is actually warm enough to activate the main blower.
General indicators that your main limit switch is dying
- The heating and cooling system will not even start or run like it ought to
- Your system starts to become unpredictable occasionally
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