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rodneysphoto 12-20-2010 05:14 PM

Repaired Automatic Climate Control Problem
Working with a 2002 Grand Cherokee.

Pulled the dash, heating/ac unit and replaced the broken bend doors, heater
core and actuators to be safe and when I got it back together it seemed
fine but after time went on passenger side got cool and now the driver’s side
went to the cool no mater the adjustment setting.

When trying to Calibrate it seems to turn the actuators to far and pop
and carry on and looks too make a complete round when looking at the
actuator with the glove box down.

Frango100 12-21-2010 06:53 AM

Re: Repaired Automatic Climate Control Problem
With accumulators you mean the blend door actuators, isnīt it? The blend doors should have an end stop and when you do the calibration, the actuators should stop at the end stop, so the system knows this position. When the actuators move around completely, it seems that the end stops are broken. I have never opened this system myself, but probably someone who already did can tell you where to look at.

GiggityGiggity 12-21-2010 09:19 AM

Re: Repaired Automatic Climate Control Problem
Interested to know how much time and work was involved in taking the dash apart for the fix. Most people seem to repair the problem by cutting a hole opposite the glove near the actuator and replacing the doors from that access hole.

rodneysphoto 12-21-2010 12:12 PM

Re: Repaired Automatic Climate Control Problem
it wasn't to bad im fixing to have to do it agin being the actuator in the rear not stopping, but i thought the stops where on the doors them self's once i get a min ill record the clicking and popping sounds going on with it

rodneysphoto 12-21-2010 12:19 PM

Re: Repaired Automatic Climate Control Problem
4 Attachment(s)
here are some pics i have taking so far and a video

Asativa 12-21-2010 12:49 PM

Re: Repaired Automatic Climate Control Problem
imo, more than likely, u didnt get the stop pins on the doors correct. the blend doors have a pin, that acts as an open and close stop point. if they were set incorrectly, both doors have probably fallen into the down position causing cold air from both sides. check the heatertreater website for pics and instructions on how to properly set the door in place during installation. im sorry i dont have any pics myself on how to do this.

rodneysphoto 12-21-2010 04:30 PM

Re: Repaired Automatic Climate Control Problem
1 Attachment(s)
the stop position is on the lever and the stops are set in the plastic

rodneysphoto 12-21-2010 05:51 PM

Re: Repaired Automatic Climate Control Problem
here is the front actuator popping and spinning when you pull it off u can move the door just fine and get heat

don't seem the youtube thing is working

Frango100 12-22-2010 06:03 AM

Re: Repaired Automatic Climate Control Problem
So if the doors are ok, then only the actuator is left. Do you still have the old actuators? You could try one on the actuator behind the glove box (drivers side actuator).

GiggityGiggity 12-22-2010 10:12 AM

Re: Repaired Automatic Climate Control Problem
wow! now I see why the glove box is the preferred method. lol

I thought I might be able to do this in a day since I haven't fixed my blend doors. I'll wait till spring for this project, for now, screw threw the glove box to prop the blend doors open it is!

GL, keep us posted!

rodneysphoto 12-22-2010 04:54 PM

Re: Repaired Automatic Climate Control Problem
K found the problem its the bend door levers not fitting properly in the actuators to make a snug fit, its like putting a 6 point 9/16 wrench on a 1/2 bolt and with the thin outer Dia it just deforms and slips inside i zoomed in on this video clip to show it better to bad i was able to wrap it with tape and get the front 1 to work but the back is still slipping

this is a bad part and would stay away from it Dorman 902-307

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