Edmunds dealer partner, Bayway Leasing, is now offering transparent lease deals via these forums. Click here to see the latest vehicles!
Popular New Cars
Popular Used Sedans
Popular Used SUVs
Popular Used Pickup Trucks
Popular Used Hatchbacks
Popular Used Minivans
Popular Used Coupes
Popular Used Wagons
Comments
Sending info around by email doesn't help anyone else and defeats the purpose of having a forum, so please don't ask for "private" help via email. Thanks.
many thanks
the following link is brilliant although it is designed towards their product for fixing the problems. the videos show how to remove the dash.
http://www.heatertreater.net/Jeep%20Page.htm
the ac and heating problems are caused by the blend doors which there are 2 on climate models.
these problems are caused by a design fault. the spindles which the blend doors and circ doors are connected to have plastic pegs to limit their movement and because the system self calibrates in ignition cycles and learns the limits by where the motors stop.
after a period of time the self calibration tests break the plastic peg and the stresses are transferred to the connection between the spindle and the door which eventually breaks completely.
if it is the drivers side which has the problem this can be accessed through the glove box.
i have managed to repair mine by drilling the spindle and inserting a 3mm metal pin and then with a small amount of epoxy on the end of the spindal reinserting it into the blend door. this will only work if most of the blend door end piece is intact.
for the passenger side blend door and problems with the recirc door the unit has to come out.
<img src="
I also found references for my codes and was told it's more than likey that my blend doors are going to crap out soon.
my heater has started to blow cold air only,even when i select high temperature.my coolant level is fine and the air blows throgh whatever vent i choose on the heater controls.
my tempeature in the engine remains constant and both my radiator hoses get hot when the engine reaches temperature.
what do you think is wrong ?
do i need to flush the heater core ?
will this help?
is there a cheap fix ?
is the thermostat ok you think ?
please help me
thanks in advance
Before you start changing parts.
The 97 Jeep GC Limited has the Automatic Temperature Control system.
This system has an onboard diagnostic function for your HVAC system.
You can check the fault codes for the HVAC system to give you a starting point for finding out where your heating troubles are.
To read the fault codes:
1. Turn on the ignition switch.
2. Turn on the ATC system.
3. Simultaneously hold down the AC and the Re-Circ buttons.
4. Hold them in and turn the temperature control knob to the right (CW) one click.
5. Then release the AC and Re-Circ buttons. The “00” will show on the display.
6. Now press either the AC or the Recirc button and the “stickman” will appear, indicating the fault code mode.
If there are any codes in memory, the fault codes from 1 to 64 will appear.
There is no air flow in my 2002 Grand Charokee 4.7L. When I click the AC button it lights up, I do hear a noise as if something has started but there is no air flow. I don't get air flow even when I do outside air. The mechanic is asking $600 just to find the problem.
Is it a broken recirculation door or a broken blend door or something else? Please help.
Without knowing which Jeep GC model you have, if you have the AZC Automatic Zone Control HVAC system, I would recommend that you check the AZC fault codes.
To read the fault codes:
1. Turn on the ignition switch.
2. Turn on the AZC system. The temperature settings should be displayed for both sides.
3. Simultaneously hold down the AC and the Re-Circ buttons.
4. Then turn the driver’s side temperature (Left) control knob to the right (CW) one click.
5. Then release the AC and Re-Circ buttons.
If there are no fault codes, the “00” display value will remain in the window.
If there are any codes, each will be displayed for one second in ascending numerical sequence (note: no effort is made to display faults in the order they occurred). The left side set temperature display will be blanked and the right side set temperature display will indicate current and historical codes (8 historical max) presently active.
Once all codes have been displayed, the system will repeat the fault code numbers. This will continue until the left side set temperature control is moved at least one detent position in either direction, by pressing both the A/C and Recirc buttons at the same time, or the ignition is turned off.
Record all of the fault codes and post them.
Also describe any symptoms you are having with your heating system.
Like - Are you getting a good air flow thru your vent outlets?
Like can you hear the blower working, but no air flow?
Can you direct the air flow to the different outlet vents – defrost, floor or dash??
Are you getting heat on both sides.
Post your results, I’ll try to interpret them for you.
Thanks for your reply. Sorry I was out of town and could not see your reply.
I did as you had suggested and I am getting error code 52.
As far as symptoms are concerned. I hear the blower working. I feel no air when setting is at floor or direct (dash). However I feel air when it is in defrost mode. There also I don't think it is coming 100% but it is there.
There is no heating or cooling from either side as there is no air flown on either side.
Thanks for your help and I look forward to your reply.
The heating is in trouble : whatever temp I request, it blows hot air, without possibility to lower the temperature.
I have done the skech to get the errors messages from the HVAC system ; the fault codes give N° 23 and 38
What will be the further research of the default ?
Thank you
The fault code #23 - Door travel range to small -- is a blend door actuator drive circuit problem.
The #38 – Circuit was open -- is a blend door feedback circuit
It looks like you may have an actuator motor problem or the coupler that connects the actuator motor to the blend door could be broken.
Remove the actuator motor on the bottom of the HVAC box to examine the coupler.
While the actuator motor is off try turning the shaft of the blend door to see if the air flow temperature will change.
I got the kit u suggested. However, I am not able to fix the problem as the recric door is not comeing up. Do you have a video of how to use this kit and fix the problem.
Thanks!
16 = Right temperature door not responding
42 = One of four motor drivers had drive 9A9 shorted to ground
52 = AI (Recirc) door travel range too large
54 = Left temperature door travel too large
The codes show you are having problems with a blend door, a blend door actuator motor, and the recirculation door.
But the main problem sounds like you are having trouble with the blower.
No air flow and if you can NOT hear the blower motor when it is set on HI, that is a symptom of a bad blower motor, blower motor control module or the blower wheel assembly.
Problem now is the A/C blows hot air. The heat works decently but not on floor setting. When you are driving and accelerate it just switches itself to the windshield vents until you let off on the strain you seem to be putting it in. If you turn it to vent it is hot too. Can anyone help solve my problem? I do not have the dual control that has been mentioned.
Help .... this thing is breaking me but its paid for and that is why I keep it.
Your symptom of the air flow changing locations on acceleration, sounds like a mode door problem.
Your AC blowing hot air, could be from a minor leak in the AC system that would only require a recharging - to a sensor in the transmission.
Some repair manuals will give a few tests to do on your own, but if they are not the problem, you could be wasting your time or changing parts unnecessarily.
To diagnose the AC you need the proper equipment for testing the system.
- A/C is only blowing out of defrost vents no matter what the dial is set at
Any help on these would be much appreciated.
I haven't got a cure as yet but am working on it - will report back if i find the answer.
I found that after time it will stay on just vent.
I fix the problem on my 94 GC by bypassing one of the levers that controls the flap for the diction that blows at you, found behind the steering weal, made a sml bracket to space it so it was fully open. Started the jeep up to find out that it fixed the whole problem.
Also replaced the one way valve on the block 4.99 part.
Cant believe it was that easy.
http://www.wjjeeps.com/climate.htm
If you do not get any air flow thru your HVAC system but you can still hear the blower motor working.
That is a sign the door has completely broken and has fallen down blocking the air flow into the HVAC box.
A short descriptions about the recirculation door. It blocks off one of two vent openings.
One vent opening takes air from inside of the vehicle and the other vent opening takes air from the outside of the vehicle. (The exterior grille area at the bottom of the windshield)
Since you have the fault code #52, I recommend that you check the recirculation door manually.
If you lower the glove box and look to the top right side of the glove box opening. You will see a grill Or grid like area. That is the recirculation door housing. If you look inside the recirculation door housing you should see a gray colored foam door up against the grid area or back against the exterior air intake opening.
A flash light would be helpful.
If you do not see the gray foam recirc door, it has broken off and fallen down blocking the air flow thru the blower.
You can lift the fallen recirculation door up off the blower and the air flow will be restored.
1. To lower the glove box. There are two plastic tab stops sticking up past the top back wall of the glove box that hit against rubber stops. Fold these rubber pieces to the side (They are attached only on one side so as to act as a hinge point)
2. Remove the dampener arm on the right side of the glove box by sliding the end up and out of the key slot. The glove box should be hanging down at this point.
Again if you can hear the blower working, but you do not get any air flow thru your HVAC system.
That is a sign the recirculation door has completely broken and has fallen down blocking the air flow into the HVAC box.