brandon_g

Im having a problem with my heating controls.It is stuck on defrost.Its not stuck like I can move it to any other setting like feet or whatever,but it wont change it will just stay on defrost,and even when I turn it to off it still stays on defrost.The blower level works and the heat and cold climate work fine it just always is stuck on defrost.An ideas?thanks.

PRO50SC

check the vacuum supply to the controls. Broken/unhooked line. bad switch in the dash, vacuum canister leaking.

brandon_g

are those controls just behind everything?Like the dash?

PRO50SC

yup, have you done anything under the hood lately

brandon_g

I just had my auto switched to a manual lol.Whole tune up as well..plugs,wires,fuel filter...

PRO50SC

Did it work ok prior to that? Maybe one of the lines was knocked loose. Look around under the hood near the pass side fire wall and see if you find one.

93_five_oh

check the vacuum distribution tree. where the brake booster line comes out of. if you look closely, you'll see a litte "A/C" stamped in it. if that line is disconnected it will only blow out the defroster. mine broke there. if not, check the vac lines you can get to under/ to the left of the glove box before you start taking things apart...
hope you find it.

brandon_g

thanks guys,Im gonna check it out today after work.

dillon1340

you fix it? what was the problem?

brandon_g

still didnt check it.I noticed my shifter was shaking just the handle so I took the boot off and saw that one of the bolts came out,so I fixed that first.Ill let you guys know though tomorrow.Friday is my day off so either thursday or friday ill try and fix it.