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Carrier 38GRQB09 Limit Switch
Limit switches are built due to the fact that if the air inside the furnace is too cool the you will lose all the heat as the air flows through the ducts. The limit switch has a sensor located in the furnace that determines when the heated air is warmed to a point to activate the main blower.
Clues critical limit switch is in dire need of a replacement
- Your system is beginning to run erratically on a regular basis
- Your Carrier system will not even start or continue to run even though the desired temperature has not been attained
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