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International Comfort Products PGF060S140E Limit Switch
A normal limit switch is a type of sensor switch in the heating area that decides when the heated air is actually warm enough to activate the main blower. Limit switches are built due to the fact that if the air inside the furnace is too cool then you will never get hot air through the ducts.
Simple indications to watch for in a bad main limit switch
- The HVAC system is beginning to stop suddenly on more than one occasion
- System will not begin or run even though the desired temperature has not been attained
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