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International Comfort Products C9MPT100J16B1 Limit Switch
The main reason limit switches are made is because if the air never warms up the you will lose all the heat as the air flows through the ducts. The limit switch is a type of sensor switch in the heat exchanger that senses, or governs, when the heated air is warmed to a point that it can be circulated throughout the house.
Important signs limit switch is on its last leg
- The system is beginning to go through the startup sequence but stops quickly time after time
- System will not even start or will not stay running even though max temp has not been reached
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