1999 Jeep Grand Cherokee Limited,Dual climate control blows cool air on the driver side and hot on the passenger side. Was told by dealership item is located behind the dashboard and the repair cost is $800 (Actuator) is there another fix to this problem?

apparently it is dual climate control. most common failure is the blend door actuator motor has gone bad on the passenger side. however it could be the door in the HVAC box has broken or the control head is bad.

You will have to check the flap operating controls behind the centre consol as anything could be wrong from a vacumn pipe to a operating mechanism ,even the computer controlling the climatic control .

automatic climate control with dual controls?

Sounds like a broken drivers side blend door. Very common problem. Jeep has a repair kit that includes a new metal blend door and instructions on how to cut out an access in the HVAC housing. The kit also includes a new passenger blend door. If you want to replace both you',, need to pull the entire dash and then the HVAC housing which is a much better but more time consuming way of doing it. Pulling the housing is a huge job!

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

If you have duel climate control, it sounds like the blend doors inside the heater box have broke. It is a rather large repair to do. If you don't have duel climate control, look for a broken, leaking or aged vacuum line under the battery try. Hope this helps.

Best of luck

Common Jeep problem. Blend doors are either jammed or broken. Dashboard removal is require to repair.

the door isnt actuating for that vent
could be vaccum or the cable on it
Cheers Rob

My 1999 limited does this. When i bought it off the guy he said that its because of some flap down by the passengers left foot. In mine the passenger air barely even blows because of this.

This is obviously a heater system control problem, I beleive this system is vaccuum controled with vacuum acuators that open and close doors in response to the climate control system comands.

Listen for the sound of escaping air from under the dash board, esp on the drivers side. Look for any unattached hoses under the dash. From there if you do not see anything obvious, you will have to obtain a schematic of the HVAC system, understand it's opearation and then start testing the vacuum control devices. maybe more than you want to do.

Goos Luck

try flushing out the heater radiator core.remove the two pipes and put a hose on the conections and keep reverseing flow.dont forget to top up with pure antifreeze,

look for Main A/C relay, look for fuses, or go to a/c shop and have gas check out, perhaps leaks, perhaps evaporator, perhaps condenser, but start for relay box on front passengers side, or fuses on same side