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Carrier 38QRR024 Limit Switch
The limit switch is a switch located in the furnace that determines if and when the air is warm enough for the blower to be activated. Limit switches were created due to the fact that if the air never warms up inside the exchanger the you will lose all the heat as the air flows through the ducts.
Some warnings poorly running limit type switch
- The heating and cooling system refuses to kick in or run longer that five minutes
- The Carrier system begins to behave erratically repeatedly
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