Join Date: Feb 2008
i think there is a blend door fix thread here somewhere. Not sure it pertains to your model year.
There is also a check valve under the hood, near the firewall on the passenger side that may need either installing or replacing on some models.
Then again, you might have a broken blend door....as described in the thread I saw about a year ago.
2007 5.7 Hemi, Ltd. QD II -
1997 ZJ, 4,0 select trac, Up country, track lok.