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International Comfort Products NHP036AKA1 Limit Switch
The limit switch contains a sensor located in the furnace that determines when the air is warm enough for the blower to be activated. The main reason limit switches are made is because if the air is too cool inside the furnace to begin with, then you will never get hot air through the ducts.
Major indications main limit switch has very little life left
- System is unable to start or run longer than a minute
- The system begins to runs spotty often
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