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International Comfort Products GDE075F16A1 Limit Switch
The limit switch has a sensor in the heat exchanger that can determine when the air is warm enough to activate the main blower. The main reason limit switches are made is because if the air never warms up the you will lose heat in the ducts and the vents will just blow cool air.
Some warnings critical limit switch is going out
- The heating and AC system refuses to start or run even though the desired temperature has not been attained
- The system starts to run erratically often
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