1997 Mountaineer - heat and AC work but not able to adjust the temp could flap door be stuck or any other possibilities?
It's the door. I just had mine replaced. BUT..... do not go to a garage. They want 5-6 hr labor charge to pull the dash and fix. BS. If you search online there's a web site that sells a replacement door for $119 and the instruction to fix it through the glove box. 1 hr time for a good handy man..Good luck.