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Jeep Grand Cherokee A/C Heating Ventilation

510 messages,  Last post on Mar 23, 2013 at 12:29 PM

You are in the Jeep Cherokee and Jeep Grand Cherokee Forum.

What is this discussion about? Jeep Grand Cherokee, Heating / Cooling, SUV

Messages Page 42 of 52

#404 of 510 heater blowing cold air by jukeboxtango

Feb 08, 2010 (9:08 am)

i have a grand jeep cherokee ltd 1997
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

#405 of 510 BLEND DOOR LOCATION by rdebartolomeis

Feb 20, 2010 (9:00 am)

cAN ANYONE TELL ME WHERE THE BLEND AND RECIRC DOORS ARE LOCATED OM A 98 LAREDO tHANKS

#407 of 510 Re: heater blowing cold air [jukeboxtango] by blendor

Feb 21, 2010 (5:57 am)

Replying to: jukeboxtango (Feb 08, 2010 9:08 am)
Hello Jukeboxtango:
  
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.

#408 of 510 NO Air Flow in 02 Jeep by narya77

Mar 30, 2010 (12:35 pm)

Hi,
 
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.

#409 of 510 Re: NO Air Flow in 02 Jeep [narya77] by blendor

Mar 30, 2010 (4:38 pm)

Replying to: narya77 (Mar 30, 2010 12:35 pm)
Hello Narya77:
 
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.

#410 of 510 Re: NO Air Flow in 02 Jeep [blendor] by narya77

Apr 06, 2010 (10:00 am)

Replying to: blendor (Mar 30, 2010 4:38 pm)
HI Blendor,
 
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.

#411 of 510 Re: NO Air Flow in 02 Jeep [narya77] by shelley91935

Apr 06, 2010 (5:05 pm)

Replying to: narya77 (Apr 06, 2010 10:00 am)
I had a 2000 Jeep GC with the "A/C not blowing out of center ducts" in 2004. When I went to the dealership they "Removed battery tray and repaired vacuum leak" this also had to be done again in approx 2009.

#413 of 510 Re: NO Air Flow in 02 Jeep [blendor] by narya77

Apr 08, 2010 (9:26 am)

Tx Blendor! I have ordered the fix you have suggested. I will update you with results. Thanks for your help!

Messages Page 42 of 52

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