heat/defrost problem
#2
#3
RE: heat/defrost problem
i have seen this problem before. it is the a/c switch. i had to replace mine. the top ****, the one which selects whether floor, vent, or both, ect. Mine would still turn but it blows out the defrost vents no matter where it is. I replaced the switch and it fixed it.
#4
RE: heat/defrost problem
Ya actually, that sounds more like your problem then what I first stated, or you could have lost all vacuum. If it is only a vacuum leak like I first stated, it will switch to defrost only under load (like when going up a hill), but the rest of the time you are not on the throttle, it will blow out of the correct vent. So if you can never get it to blow out of the correct vent, then it could be your switch or you have no vacuum at all.