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Friedrich MR09C1H Limit Switch
A normal limit switch contains a sensor in the heat exchanger that decides when the heated air is warm enough for the air to begin normal home circulation. This is important because if the warmed air is too cool then you will never get hot air through the ducts.
Red flags of a declining limit switch
- Your Friedrich system will not start or run well even though max temp has not been reached
- Your system is starting to initiate and then stops on a regular basis
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