JDawg965

Ok, long time reader... not to many posts... ok well I have a 2000 grand Cherokee Laredo.. my issue is the ac works great... except when the car is under a load it only blows out the defrost I searched around and read other issues, but non quite like mine... here is what I have done so far...

Looked for vacuum leaks..
Only thing I came up with is there seems to be a small leak in the brake booster.....
The cruise control DOES work so I thought that would eliminate the vacuum issue causing the ac vents..

The HVAC selector works fine. The air will work on all settings... I am at a lose... what do you guys have???

Thanks