Hi,This is risky business, not responsible for damages on your end. We *keep going until *you are happy. I come and go. be patient
You may have blown a fuse on the printed circuit board .. its a 3 to 5 amp fuse, automotive type on the card.
Look for that... then find where the wires from the thermostat land in the furnace or inside air handler... a red, white, yellow and green.. small wires.. verify they come from the thermostat.. then jumper red to green and tell me if the fan runs or not.
We can go from there, Phil
Okay, thanks... I think it is time for me to call a technician to come out. I don't feel comfortable doing that...