I joined this community to get access to the sketches and pics I found that could help me figure out how to get the AC air to come through the dash vents again. Started coming through the defrost only. I have the manual system.
Welcome to the garage.
The manual system uses a vacuum operated mode door actuator. This actuator is failsafe (so without vacuum) in the defrost position. Vacuum is taken from the engine intake.
There is probably a loose or worn through vacuum line under the hood
JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.