No air coming out of dash vents

[Bob Keene]

I have checked vacumn lines and all looks good.
Have A/C and heat.
Defrost blows strong against windshield.
All other settings only blow air at the floor.
Blend door/ actuator issue?
I am getting a flutter noise on all settings.
Possible vent blockage.
Thanks,
Bob

 

[Rubirob]

I have checked vacumn lines and all looks good.
Have A/C and heat.
Defrost blows strong against windshield.
All other settings only blow air at the floor.
Blend door/ actuator issue?
I am getting a flutter noise on all settings.
Possible vent blockage.
Thanks,
Bob

I have this problem as well, but haven’t gotten around to checking it out too much


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[Chris]

Check out these threads:
How to fix heat / AC / air not blowing through center vents
Air won't come out of vents? Read this!

I can almost guarantee the solution is in that second thread there.

 

[AvocadosGuac]

Sounds like your vacuum line is borked.

Had to redo the plastic tube on mine when i got it 3 weeks ago as it would only work on defrost

 

[Bob Keene]

Thanks for the info.
Vacumn lines all look good.
For a 2002 TJ is the blend door and actuator behind glove box,
or is it uner the center conssole.

 

[sweld]

Check and make sure the knob is not stripped on the inside.


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[Chris]

Thanks for the info.
Vacumn lines all look good.
For a 2002 TJ is the blend door and actuator behind glove box,
or is it uner the center conssole.

Not 100% sure on the 2002 model. Have you checked your vacuum lines where the go under the battery? I know that’s a common place for them to fail.

I think this write-up will work for you, as it’s for a 97, which would be the same as an 02:

https://wranglertjforum.com/threads/how-to-fix-heat-ac-air-not-blowing-through-center-vents.2887/

 

[Bob Keene]

Not 100% sure on the 2002 model. Have you checked your vacuum lines where the go under the battery? I know that’s a common place for them to fail.

I think this write-up will work for you, as it’s for a 97, which would be the same as an 02:

https://wranglertjforum.com/threads/how-to-fix-heat-ac-air-not-blowing-through-center-vents.2887/

 

[Bob Keene]

haven't been able to confirm line to resevoir under battery is good.
I have crawled under jeep three different ways and i don't see anything.
If I pull out battery can I see and check it?

 

[UpperMI]

It’s ironic, but I have a 2002 with the opposite issue. Air from the vents but nothing out of the defroster. I haven’t tried to figure it out yet.

 

[Bob Keene]

May a defroster accuator issue under the dash

 

[Imapepper]

Does anybody use these anymore?

 

[Chris]

Does anybody use these anymore?View attachment 45544

A vacuum brake bleeder?

haven't been able to confirm line to resevoir under battery is good.
I have crawled under jeep three different ways and i don't see anything.
If I pull out battery can I see and check it?

Good question. I think you have to remove the battery to see it, though I'm not 100% sure as I haven't dug around under there yet. I just know that some people who have had this issue traced it to a cracked vacuum line under the battery.

Either way, your issue is either a vacuum leak or a stuck blend door. It's got to be one of those, as those are almost always the most common causes of the vents that won't blow air.

 

[Rubirob]

It’s ironic, but I have a 2002 with the opposite issue. Air from the vents but nothing out of the defroster. I haven’t tried to figure it out yet.

It’s definitely the type of problem where I said “ I will fix that one day” haha


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[Imapepper]

A vacuum brake bleeder?

Works on vacuum lines and actuators also

 

[Chris]

Works on vacuum lines and actuators also

I guess I never thought of doing that! Good idea though, I have one sitting in my toolbox.

 

[KCsTJ]

Does anybody use these anymore?View attachment 45544

It's a brake bleeder but it's great for checking vacuum lines and map sensors and purge valves