Furnace fan manual or auto

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Which Way to Set the White AUTO / MANUAL Fan Control Switch. Sensing Furnace Temperatures How to manually turn on a furnace or air conditioning blower fan. The main benefit of setting the thermostat to 'Auto' is that it will result in more energy efficient usage. This is because the fan will run only when it's Otherwise, the fan is circulating and filtering the air inside your house. Using the auto setting is a very basic type of manual programming tool.Ask an HVAC Expert. Posted by bellbros. blog Energy Efficiency Heating. furnace fan on or auto in winter Our friend Pat in