Quote:
Originally Posted by JRTJH
The fan in the furnace is a 12 VDC single speed fan. Changing the thermostat fan switch from HI to LOW to AUTO only affects the fan in the air conditioner. It has no effect on the furnace fan. Is it possible that you left the vent covers off the other vents and that is what caused the lower temperatures?
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No, I did not leave the registers off.