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Old 11-07-2010, 10:13 PM   #1
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Default Air only comes out of defrost and foot vents

Hello,

After doing some work under the hood the other day, I am now only getting air flow from the defrost and floor vents. This is for both AC and heat. Probably bumped some vacuum hoses? Thanks in advance.

Kris
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Old 11-07-2010, 10:23 PM   #2
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There should be a vacuum line that goes threw your firewall that controls the HVAC system. I can't remember where that nibble is right now, but I'm willing to bet you hit it and may have broke it off.
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Old 11-07-2010, 10:37 PM   #3
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Is that on a Bonneville?
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Old 11-07-2010, 10:41 PM   #4
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Hmm, that would make sense Danthurs. I feel air coming out from the gap beneath my after-market stereo as well if that aids that theory at all.

Yes, 94 Bonneville SE.
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Old 11-08-2010, 07:53 AM   #5
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There is a vacuum box on the firewall. It'll be next to the vaccum booster and should have a vacuum line and check valve going to it. Make sure both of those are in good shape. The most common issue with them is dry rot and the line pulling off.

I suspect you'll come back with vacuum hose black fingers when you touch it.
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Old 11-08-2010, 04:15 PM   #6
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Easiest fix I've ever had! Located directly behind trans dipstick for future reference. Right in plain sight. Thanks a bunch
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