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International Comfort Products PGMD24G0406 Limit Switch
One big reason why limit switches are designed that way is due to the fact that if the air never warms up inside the exchanger the you will lose all the heat as the air flows through the ducts. The limit switch is a switch in the heat exchanger that makes the determination when the air is warmed to a point that it can be circulated throughout the house.
Major signs of a declining critical limit switch
- The HVAC system starts to go through the startup sequence but stops quickly on more than one occasion
- Your International Comfort Products system will not even start nor will it stay running even though the desired temperature has not been attained
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