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International Comfort Products C9MPT100J16A1 Limit Switch
The limit switch contains a sensor located in the furnace that can determine when the air is warmed to a point that it can be circulated throughout the house. One big reason why limit switches are designed that way is because if the air is not warm enough then you will never get hot air through the ducts.
Indications of a weak main limit switch
- The International Comfort Products system is starting to go through the startup sequence but stops quickly occasionally
- The HVAC system will not start or run like it is supposed to
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