Low A/C air flow pressure

KJS111

MEMBER
1999 CHEVROLET TAHOE
V8
4WD
AUTOMATIC
75,000 MILES

The A/C blows cold air but the air flow pressure is very low. Please help.

Sunday, November 29th, 2009 AT 1:39 PM

6 Replies

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

It sounds like you have a mode blend door that is not working which is common. Here are to guides to help you get the problem fixed:

https://www.2carpros.com/articles/replace-blend-door-motor

and

https://www.2carpros.com/articles/low-or-no-air-flow-from-vents

Please run down these guides and report back.

Cheers

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Sunday, November 29th, 2009 AT 6:35 PM

KJS111

MEMBER
2 POSTS

Yep, you were right I checked out the mode door actuator and it was not moving so I got a new one for $67.00 on Amazon and it works great! Thanks for the guides they really helped. I love this site.

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Sunday, November 29th, 2009 AT 7:32 PM

GARFIELDNEWS

MEMBER
2 POSTS
1996 CHEVROLET TAHOE
5.7L
V8
4WD
AUTOMATIC
140,000 MILES

The air flow on the air conditioner is very low. Someone had suggested a clogged cabin filter but I saw on your site that this vehicle does not have one. Other than checking the duct work for leaks and misalignment, do you have any suggestions as to how to get the cold air to blow out? The fan seems to work, just very little directs up top.

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Tuesday, September 4th, 2018 AT 5:00 PM (Merged)

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

Is the air blowing out of the wrong area? For example, you have it set on the vents, but it blows out the defroster hard and only a little from the vents.

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Tuesday, September 4th, 2018 AT 5:00 PM (Merged)

GARFIELDNEWS

MEMBER
2 POSTS

There is some leakage under the dash which I have to address. The flow does change when the controls are switched so it does direct properly but the flow is weak at best.