contrail1

I have a 94 GT and my vents will not open to allow the air to flow through. The flap in the dash is suppose to open but it doesn't. I check all the vacuum hoses and they are all connected. So, I'm guessing the device that controls the flap in the dash isn't functioning. Can anyone offer suggestions?

mrdeep2001

not sure what flap you mean? Does the air (heat or a/c) turn on at all? If so, does it only come out of the defroster vents by the windshield?

94StinkinLincoln

u got a vaccume leak, check under the hood drivers side, there is a vaccume T, make sure your vac lines dont have a leak.

the blend door actuator is controlled by a vaccume line.

contrail1

Yea, It blows only out of the defrost vent.

mrdeep2001

I had a similar problem with my 95 GT. For me, problem was a broken vacuum line under the hood. look under the hood and by the firewall should be some little black hoses on the driver side. There will be this thing that has a bunch of vacuum lines coming out of it and if you look closely, one of them should say A/C i think (If not, its probably the skinniest line) Trace that and check if its broken or disconnected. On my car, I traced it over to the passenger side and there was a T-connection that had broken.

That should be the fix, but either way let us know. Good luck.

if you need more info, see:

https://mustangforums.com/m_4957409/...tm.htm#4957409

or post back here[8D]

contrail1

I'll check it out and thanks for the details of where and what to look for. If I need to replace a vacuum line, where's a good place to by replacements from???

mrdeep2001

auto parts store i guess, i would just macgyver something up. Mine was broken where the hose connected to the T fitting and I just wrapped some electrical tape around it....

contrail1

LOL, I haven't heard that one in a minute "MacGyver"...Tru dat, I'll see what I can whip up if I find a break.

mrdeep2001

haha i loved that show, it was the ****!