Air only comes out of defroster vents?

[BlownFiveLiter]

so i have a question...my a/c doesnt work right now. is that because of this? it was working before it did this problem. if i fix that vacume line, the a/c will work again?

Unfortunately, no. This is just related to where the air comes out of the ventilation system, as it's vacuum controlled. When the vacuum line in question breaks, the air only comes out of the defroster.

 

[Rrich]

found my problem.

there are 3 lines that are on the drivers side right next to the hood hinge, connected to the fender. well the second one down had broken off right at the connection with the rubber piece. all i had to do was pull out the broken piece from the rubber piece and stick in the hose again.

5 minute fix!!!!

 

[cbrcolt45]

found my problem.

there are 3 lines that are on the drivers side right next to the hood hinge, connected to the fender. well the second one down had broken off right at the connection with the rubber piece. all i had to do was pull out the broken piece from the rubber piece and stick in the hose again.

5 minute fix!!!!

I had the same problem and was going to take it into the shop, read this post and fixed it in 5 minutes!!! The line is very small about 1/4 inch, thanks people!:SNSign:

 

[MustangSteve007]

Hey guys,

I am having the same problem with my 2002. All hoses along the firewall are extremely healthy, however there is no suction on any of them when i select any setting. The heat and AC only come out of the defroster vents. Is this more than likely the switch? If so, know anywhere i can buy it?


Thanks a lot!

 

[95GT 5.0]

A/C vent problem

Hello,

I just had the very same problem with my Mustang A/C. If you only get air through your defrost vents on top of your dash, then here's the problem and how to fix it for under $5. Open the hood and find where your A/c hoses come out of the firewall which should be on the passenger side. They are metal pipes usually and there should be a small black vacuum hose close to them. Follow that from the firewall to the connection in the engine compartment. You'll either see a break in the hose or a pinch. What I did was take the hose off at the connection and cut the rubber cushion cup off at the end. I then took a small drill bit about the size of the hose, but not bigger and screwed it through the cushion cup. Then pushed the black hose back through the cushion cup and re-connected the 2 ends and turned on my car so the engine is running. Then turned on the A/C and it worked perfectly. Thety say to replace the entire hose but a new hose does not have the cushion cup at the end. This is the best way to do it without having to pay a single penny out of pocket. I tore my entire dash apart only to find out what the real problem was. Should only take a few minutes to fix the problem once you locate the vacuum hose.

Let me know if this helps by sending me an email to [email protected]

I found the vacuum hose where you said they were, and it is all cracked and dry rotted so this must be the problem with my a/c. My question is, when i follow the hose, it disappears SOMEWHERE in the engine and I am unable to see, or feel where it goes. How do I know where to reconnect the hose when i replace the whole thing?

 

[HISSIN50]

I found the vacuum hose where you said they were, and it is all cracked and dry rotted so this must be the problem with my a/c. My question is, when i follow the hose, it disappears SOMEWHERE in the engine and I am unable to see, or feel where it goes. How do I know where to reconnect the hose when i replace the whole thing?

It should just run behind the plenum (and along the firewall) over to the driver's side, where it connects to the vacuum tree in the corner.

 

[revhead347]

I found the vacuum hose where you said they were, and it is all cracked and dry rotted so this must be the problem with my a/c. My question is, when i follow the hose, it disappears SOMEWHERE in the engine and I am unable to see, or feel where it goes. How do I know where to reconnect the hose when i replace the whole thing?

It's probably broken and fallen down into the engine. It runs from the firewall on the passenger side where the AC pressure lines go through the firewall to the vacuum tree on the inner fender of the driver's side.

Kurt

 

[95GT 5.0]

Would someone be able to post some pictures just so I can see it and know for sure? When I follow the hose, I can't tell if I am able to move it from its current location. I don't want to rip it off and not be able to put it back together.

 

[Hef5.0weisen]

so i have a question...my a/c doesnt work right now. is that because of this? it was working before it did this problem. if i fix that vacume line, the a/c will work again?

What part of the A/C doesn't work? If it only blows out the vents...you're in the right spot.

However...I imagine there is more to it than that (for your case) Assuming your a/c does nothing, start with jumping the pressure switch. (hood up, standing at front bumper, look at the engine compartment, back left corner...there are two metal lines with some bends...look for the plug with two wires...that is the switch. take the plug off and pput a jumper wire in {somehow some way connect the two pins}. That switch will kick the ac on/off...but it needs pressure to do so. THe o-rings in the system rot, and the pressure leaks out....switch won't allow it to turn on.

You can jump that switch and put a few cans of that system recharger in...it'll work for a few days, but the pressure will leak out again. Now...the enviromental, time consuming part...you can pop the lines apart and look for bad o-rings, but all the refrigerant will go out....neighbors might get mad at you for that. You'll need the a/c disconnect/fuel line tools. You can get them at any parts store, also o-rings, I found them at Autozone, big pack of 'em, and a few cans of the recharge stuff. It's all pretty cheap. Good luck

 

[94stangfan]

I had the same problem. I bought some line that matched the size of the opening. I think it may have been fuel line actually. It was only like $3. You only need about 2.5 feet of it. The vacuum line is really hard to identify because this little thin one is actually black. it runs under all the other vacuum hoses that are there and if the plastic little line broke off like mine did, it is hard to see. it will join around the middle of the firewall area. If you look on the drivers side of the car there is a little vaccum tree. That is where the line ends at. find the one (there is only one like this) that has the rubber end and plastic vacuum line. It will take about 5 minutes to fix once you find where it connects.

 

[99FiveOh]

It's the only small plastic line that runs across the firewall. Just look around where your A/C lines go into the firewall and you'll see the small line coming out of the insulation and that's the line you follow.

 

[fiveomar]

Reopening an old thread because I have this same exact issue.

My vacuum hose actually snapped. If I buy new hose, what I would I use to connect the two ends (to join the broken off end to the end of the new hose)? Is there some sort of connector that is easily available, or should I use electrical heat shrink tubing as another posted here did? Not sure that I even need a new hose if I can get the two broken ends to join up.

 

[fiveomar]

Reopening an old thread because I have this same exact issue.

My vacuum hose actually snapped. If I buy new hose, what I would I use to connect the two ends (to join the broken off end to the end of the new hose)? Is there some sort of connector that is easily available, or should I use electrical heat shrink tubing as another posted here did? Not sure that I even need a new hose if I can get the two broken ends to join up.

Can't edit my previous post so adding onto it:

The vacuum line snapped around 1 foot away from where it enters through the firewall. Just wondering if the vacuum line can be easily removed and replaced at that firewall entry point, in other words, should I replace the whole vacuum line or just try to mend it back together where it broke?

 

[99FiveOh]

heat shrink works perfectly!

 

[Gearbanger 101]

X2 for heat-shrink. Fixed mine right up.

 

[fiveomar]

Thanks gents...will give the heat shrink wrap a try.