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 a/c only blows on defrost
#10875831
05/27/15 06:42 PM
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Joined: Mar 2010
Posts: 4,669
B-rader
OP
TFF Team Angler
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OP
TFF Team Angler
Joined: Mar 2010
Posts: 4,669 |
02 dodge ram diesel . I had a couple pieces of rotted connections to the vacuum line coming off the motor and followed it to the firewall . I still can't get air to any vents . Anything else I can check?
A-RIGS , MAKING BAD FISHERMAN LOOK GOOD SINCE 2010
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Re: a/c only blows on defrost
[Re: B-rader]
#10875940
05/27/15 07:25 PM
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Joined: Jan 2005
Posts: 7,490
redchevy
TFF Celebrity
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TFF Celebrity
Joined: Jan 2005
Posts: 7,490 |
I believe they have a blender door that is a common problem to get stuck. May google that, I bet its your problem.
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Re: a/c only blows on defrost
[Re: B-rader]
#10876962
05/28/15 01:33 AM
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Joined: Jun 2006
Posts: 9,805
Yellowcat
TFF Celebrity
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TFF Celebrity
Joined: Jun 2006
Posts: 9,805 |
If you are sure there are no more vacuum leaks then i would suspect a broken door in the dash. Dodges are notorious for broken doors because they are all plastic.
There is a guy from around austin that makes and sells doors that will NOT EVER break. They are called heater treater. The doors are all metal so there is nothing to break. I have installed several of them in dodges throught the last couple of years. You can replace the doors without pulling the dash but i prefer to pull the dash because its not a hard job being as i have done probably 8-10 of them. Not pulling the dash requires cutting the plenum and taping it back up.
If you need any more help pm me and i will do my best
Justin 63lb, 2 58lb, several 40's, 38lb, and several 20lb yellas. 
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Re: a/c only blows on defrost
[Re: B-rader]
#10878115
05/28/15 03:34 PM
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Joined: Sep 2012
Posts: 870
TITANIUM-BACK
Pro Angler
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Pro Angler
Joined: Sep 2012
Posts: 870 |
I work on allot of diesels,autos,machinery at my house. But the Dodge like you have I have also. The vacuum line that comes off the air pump make sure the elbow isn't cracked. No air to the vents is because you have no vacuum pressure to the box or your selector knob and it defaults to the defrosters. When you turn the selector knob do you here anything like a slight air noise. You can remove the the controller from the dash to make sure the tubes running to it hasn't split or broke off from it. I have seen that happen to.
Freedom isn't free, you don't have to love it or leave it, but respect the price paid for it.
Master Caterpillar Field Mechanic. Retired
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Re: a/c only blows on defrost
[Re: B-rader]
#10880710
05/29/15 04:04 PM
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Joined: Mar 2010
Posts: 4,669
B-rader
OP
TFF Team Angler
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OP
TFF Team Angler
Joined: Mar 2010
Posts: 4,669 |
I don't hear a noise , but it did happen gradually . It would happen from time to time now it's everytime I turn on the air
A-RIGS , MAKING BAD FISHERMAN LOOK GOOD SINCE 2010
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Re: a/c only blows on defrost
[Re: B-rader]
#10888144
06/01/15 09:23 PM
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Joined: Feb 2011
Posts: 5,809
Nathan "Bull" Montgomery
TFF Celebrity
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TFF Celebrity
Joined: Feb 2011
Posts: 5,809 |
I had a similar problem on my Ranger. A/c would only blow out of dash. Replaced every freaking bad vacuum line I could find with no change. Finally got one of the guys to hook up the smoke machine to it and lo and behold the damn heater control valve was busted causing my vacuum leak! So if it has a vacuum controlled heater control valve you might check it. Mine wasnt leaking coolant but it was leaking vacuum.
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