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Amcor AWS240HR Limit Switch
A normal limit switch contains a sensor in the heating area that can determine if and when the air is warmed to a point to activate the main blower. One big reason why limit switches are designed that way is because if the air is too cool inside the furnace to begin with, then the house will never get warm enough.
Clues of a failing main limit switch
- Your system is beginning to run erratically more than once
- System will not begin nor will it stay running longer than 10 minutes
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