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Haier CPN10XHJ Limit Switch
The reason limit switches exist is due to the fact that if the air inside the furnace is too cool the you will lose all the heat as the air flows through the ducts. A normal limit switch is a type of sensor switch in the heat exchanger that decides when the heated air is actually warm enough to activate the main blower.
What are the signs that the limit switch most likely is about to go out?
- System will not start or run well even though the desired temperature has not been attained
- The system starts to runs uneven on more than one occasion
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