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Mitsubishi MSZ-GA35VA Limit Switch
The limit switch is a type of sensor switch in the air handler that makes the determination when the heated air is warmed to a point for the main blower to kick in and circulate the air. One big reason why limit switches are designed that way is due to the fact that if the air inside the furnace is too cool then you will never get hot air through the ducts.
Symptoms of a defective limit switch
- The system is beginning to behave erratically time after time
- The heating and cooling system will not start or continue to run longer than 30 seconds
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