Ok so my heat comes out hot but when I turn the **** for the fan speed it does nothing. Ive replaced the blower motor, resistor, and the Heating control board(the center with the air controls). I checked all the fuses, nothing. How would I go about finding where the problem is coming from. It might narrow down the results seeing as its ONLY the Fan control and the rear defroster switch not working. Every other control is working perfectly. I have had the entire dash removed before but I don't want to take the dash out unless I know for sure what wires to start with. Any input would be greatly appreciated, its starting to get cold out and the only way to stay warm is to drive faster...but that wont cut it much longer.