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Lennox CBX32MV-036 Limit Switch
The reason limit switches exist is because if the air is too cool inside the furnace to begin with, then you will never get hot air through the ducts. A normal limit switch is a type of sensor switch in the heat exchanger that can determine when the air is warmed to a point for the main blower to kick in and circulate the air.
Some clues critical limit switch will soon need to be replaced
- The HVAC system begins to erratically often
- The heating and AC system will not initiate or continue to run as it should
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