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International Comfort Products PGC060K100A Limit Switch
A normal limit switch has a sensor located in the furnace that can determine when the heated air is warm enough so that it may be pushed through the ducts and out the vents. This is important because if the air is too cool inside the furnace to begin with, the you will lose all the heat as the air flows through the ducts.
Key clues to watch for in a failing main limit switch
- The heating and cooling system will not start or run well longer than 30 seconds
- Your system begins to become inconsistent frequently
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