Grand Cherokee AC/Ventilation Problem
I have a 1998 Grand Cherokee with 155,000 miles on it. Still runs well with one problem. When I have the AC/Vent system on, when I step on the accelerator, the ventilation get redirected from the panel vents to the defroster vents on top of the dash. For a while, if I took my foot off the gas momentarily the airflow would go back to the panel vents, but that no longer happens. I first thought this could be a vacuum problem, but haven't been able to find any leaks. Im not getting any indication of a problem like the check engine light on or anything else. If anyone has any ideas, I sure would appreciate any suggestions of how to proceed.