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Heat Controller VMH09SC-1 Limit Switch
One big reason why limit switches are designed that way is because if the air is too cool inside the furnace to begin with, the you will lose all the heat as the air flows through the ducts. The limit switch has a sensor located in the furnace that makes the determination if and when the air is actually warm enough for the air to begin normal home circulation.
Warnings of a laboring main limit switch
- The HVAC system starts to runs uneven repeatedly
- The heating and cooling system will not begin nor will it stay running like it should
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Before you decide on buying or purchasing, do your due diligence and cross-check the model number as well as make a visual comparison in order to be sure the proper replacement limit switch is the one being purchased. HVAC pros may charge higher prices than others so you could call around to find a good deal if you want to pay bottom dollar.
Feel free to download your manual for help.
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