air does not come out front dash vents

e_16

My heat and A/C work, but they will only come out of the vents under the floor and against the windshield. It is not coming out of the vents that are in the dash...any ideas on how to fix this?

464elky · Posted: Sun Apr 15, 2007 6:32 pm Post subject:

Find the vacumn line form the engine up to the little black ball, which is a resevoir, and follow that line and look for a break. sonds like you have no vacumn to the control.
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Another 3 to 9 years should finish it.

K5Cruiser · Posted: Mon Apr 16, 2007 6:27 pm Post subject:

Do as suggested by 464elky. The flaps that direct the cold or hot air are operated off of vacuum. You have a vacuum leak somewhere, which is causing the flaps to not operate. Take some time took look at all of the vacuum lines in the engine compartment, and you'll probably find that there are quite a few that need replacement due to cracking from heat, etc.

e_16 · Posted: Mon Apr 16, 2007 6:31 pm Post subject:

is this black ball next to the A/C accumulater...if it is, the black plastic thing going into looks like it is melted shut...can i just cut the melted end off and place it back in the ball?

464elky · Posted: Mon Apr 16, 2007 8:27 pm Post subject: ball

Yes it is by the accumulator. Pull the small line off, about an 1/8 inch plastic, and start the engine. you should have vacuum at the connection on the ball. If not pull the large hose off and see if it has vacuum coming from the engine. If you have it at the outlet of the ball the break is between there and the control switch. If you don't have any on the larger hose it is broken or pulled loose down toward the manifold.
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84 Elky with 455 Buick, Tremec TKO600 5 speed, 8.5 3:42 posi -
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Another 3 to 9 years should finish it.

slywun · Posted: Thu May 03, 2007 12:03 am Post subject:

I have the same issue, found the leak (the thin colored vacuum line was split in 2 under the dash).

Where can I get a new line? I've had no luck with any of the retail stores.

Thanks,
KB
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2005 Cadillac CTS-V

Mr86Camino · Posted: Thu May 03, 2007 7:18 am Post subject:

A simple fix for the plastic hose is a rubber hose as a splice. Just take a small piece of the plastic hose to the parts store and find some rubber hose that is a tight fit to go over the plastic hose. The rubber hose may not last 20 years but your plastic hose did not last that long either. The good news it will be easy to find.
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