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Carrier 58STA11010022 Limit Switch
A normal limit switch contains a sensor in the heat exchanger that senses, or governs, when the air is actually warm enough for the blower to be activated. 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 the you will lose heat in the ducts and the vents will just blow cool air.
What are the clues to watch out for to know my limit switch is on its last leg?
- System is unable to start nor will it stay running even though the desired temperature has not been attained
- The system starts to become inconsistent more often than not
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