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Carrier 38TKB048 Limit Switch
The limit switch has a sensor in the air handler that senses, or governs, when the heated air is warm enough that it can be circulated throughout the house. Limit switches are crucial because if the air is too cool inside the furnace to begin with, then you will never get hot air through the ducts.
What signals that my limit type switch really is dying?
- The HVAC system refuses to start or will not stay running for any significant length if time
- Your system starts to shut down unexpectedly frequently
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