Have HVAC Questions? Ask an HVAC Expert for Answers
Does the fan come on when selecting FAN ON?
OK then you either have bad batteries in the thermostat or the fuse has blown in the control board inside the furnace. If you do not have a battery controlled thermostat you need to check the fuse on the board in the furnace or air handler depending on where you live.
You may have a bad thermostat, can you get at the wires to the thermostat? If so connect the RED(RH) wire to the Green(G) wire and see if the blower fan comes on...if so the thermostat is bad.
Ok if nothing happened you need to check the fuse in the furnace on the board. You will look for this in your furnace or airhandler...check the fuse on the board to see if it is blown. That will cause this issue.
Yes just open the panels on the furnace and get to the board it is where all the wires are connected to you can find it, you can remove the slot fuse yourself...it is just a 3 amp fuse remove it and check it.
It just pulls out, it may be just tight grab it with a needlenose pliers and pull it straight out.