AIR CONDITIONING

[tech10002]

You could still have a leak in the hubs even if they're still engaging. I'd highly suspect them as the culprit.

[Gator0175]

The hubs would effect the ac like that

[Goose350]

Mine was doing the same thing and a line was disconnected from my vac pump.

[2005F250]

Vacuum leak. My truck has done this twice. It's probably a vac line under the dash.

[ianstew]

There is a TSB on it somewhere....I think it's on dieselmann's site.

[Coffaro]

After 4 trys my deal gave up so I traded my 06 for an 08.

[frioranches]

On the passenger side of the motor, there is a white vac line, located on top, you can't miss it, that probably came off. I have an 05 and I was having the same problem. It seemed to fix it so far. Another thing that seemed to help if that doesn't work, is turn the fan down, for a few seconds, and turn the temp to like 82-83 degrees. It usually comes back to the front and then turn it back cold and the fan back up. Hope this helps.

[06pwrstrokerbullitt]

This should help me I have the same problem. Defrost blows and usually I can turn the climate control off a few times and eventually it will blow out the vents. Also my 4wd is a little twitchty sometimes and won't lock, it does most the time but every now and then it won't engage, but the A/C never blows out the vents until a few tries.

[kinghawg98]

a vacuum leak most likely.

I had the same problem (and it would sometimes switch to blow out dash) and found a disconnected hose.


See if you can you hear the buzz of the vacuum pump running for a long time...that'd be an indication.

[HarleyMedic]

Had the same problem yesterday. Grey vacuum line under hood on right side came loose. Stuck it back on to plug it and it was fixed.