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International Comfort Products GPFM24K060F Limit Switch
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. A normal limit switch contains a sensor in the air handler that determines if and when the air is warm enough so that it may be pushed through the ducts and out the vents.
Symptoms of a faulty limit type switch
- System will not initiate or run like it should
- The system starts to shut down unexpectedly more than once
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