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Carrier 38BYC024 Limit Switch
The limit switch is a switch in the air handler that can determine if and when the air is actually warm enough for the main blower to kick in and circulate the air. Limit switches were created because if the air is too cool inside the furnace to begin with, the you will lose all the heat as the air flows through the ducts.
General indicators that your limit switch is not going to last much longer
- The system is beginning to act differently from time to time
- System will not start or run longer that five minutes
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