I have tried recycling through Off, Cool, Heat, and back to Off. I've done this a few times. The fan has a selection for Hi, Lo, and Off. It is set to Off. There is no hot air (the thermostat is set to it's lowest setting 50 degrees). But cool air is blowing outside at the furnace exhaust. So I would say the furnace is running but blowing cold air. I am on household current.