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SPT WA-1230H Limit Switch
A normal limit switch has a sensor located in the furnace that makes the determination when the air is actually warm enough for the main blower to kick in and circulate the air. A limit switch was crafted 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.
Indications main limit switch is dead
- The system is starting to erratically on more than one occasion
- The HVAC system will not start or run like it should
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If you are going to be buying or ordering do your best and cross-check the model number and also make a visual inspection so that you are positive that the correct replacement limit switch is being ordered. Once you have the part to install the replacement part alone. Find a professional in your community to do the job for you.
Feel free to download your manual for help.
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