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Bryant 378 Limit Switch
The limit switch has a sensor in the heating area that decides when the heated air is warm enough to activate the main blower. This is important because if the air is not warm enough the you will lose heat in the ducts and the vents will just blow cool air.
Cues of a weak limit type switch
- The HVAC system starts to shut down unexpectedly occasionally
- The heating and cooling system will not initiate or will not stay running longer than a minute
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Before you decide on buying or ordering any Bryant 378 part, do your due diligence and make sure of the correct model as well as make a visual comparison in order to be sure the correct limit switch is being ordered. There is no need to install the replacement part alone. Pay a professional locally to do it for you.
Feel free to download your manual for help.
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