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Carrier FV4BNF003000 Limit Switch
Limit switches are crucial due to the fact that if the air never warms up inside the exchanger then the house will never get warm enough. The limit switch is a type of sensor switch located in the furnace that senses, or governs, when the heated air is warm enough that it can be circulated throughout the house.
Major clues of a dying main limit switch
- The Carrier system starts to run inconsistently frequently
- The heating and cooling system will not begin the ignition sequence or run well longer than 30 seconds
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