A/C blowing out of defrost vents

[93lx]

Help! Recently my air conditioning started blowing out of the defrost vents in front of the windshield. It is still blowing cold air but will not come out of the regular dash vents. Has something come loose? What should I look for and how involved is fixing this.

Thanks in advance,

93lx

 

[Jaswir]

this just happened to me as well... all of sudden went to defrost... i would like to know as well

 

[dbdragracing]

dang....I was just getting ready to post the same thing...I was working on my car today and noticed all the air was blowing out of the defrost vents.

 

[LA stang]

look under dash on passenger side and see if vacum line is attached or broken.

 

[txstang84]

also ck the one on the firewall where your heater hoses go in...those little vinyl lines are very prone to getting brittle and breaking...

 

[Daggar]

also ck the one on the firewall where your heater hoses go in...those little vinyl lines are very prone to getting brittle and breaking...

My dollar is on this being the culprit.

 

[giddyup306]

The default mode is defrost if there is not enough vac (spring closes it). Check for a vac leak. More than likely your problem is there.

 

[Henceforward]

My dollar is on this being the culprit.

I bet $10 also...

This happened to me twice, once the hose connected to the small vac splitter inside the dashboard came loose, so I opened the dash, unclipped the splitter from the left side of the inside of the dash, and stuck the loose hose back on.

The second time it happened, the hardline in the engine bay broke, so I went over to Oreilys and bought a hose kit, and a bunch of the assorted hose attachments, and found that the hard line broke right off the Vac tree, right above the Brake Booster. Check that hardline, then check the 4 way splitter that runs to the Smog, AC stuff, and then check the little splitter on the inside of the dash, and one of those will be loose, or broken.

Have to know how to fix your AC in Texas, or else you die instantly.

 

[huRACEmentPSR]

thats so fuggin wierd. same is goin on with my baby. vac lines..huh. just my luck i figure out what the problem is right when i dont need it anymore...

 

[5spd GT]

I had the exact same problem. If you look on the driver side firewall at the tree that is labeled "A/C" check and make sure that line didn't come off. Follow it the entire way. Mine became unplugged by accident during my h/c/i swap...

 

[Jaswir]

found the problem with mine ... it was the one on firewall in the engine bay... broke right in half the lil thin wire where it says A/C thanks for your help guys

 

[5spd GT]

found the problem with mine ... it was the one on firewall in the engine bay... broke right in half the lil thin wire where it says A/C thanks for your help guys

Just like mine...how 'bout that