Incident: Defog & heat does not work; had to drive 25 miles with windshield wipers on constantly in order to clear windshield, still did not do well even with newer wipers... 1) I woke up, started up Jeep Grand Cherokee in order to defog windshield since it got cooler overnight leaving fog on windshield. 2) defog would not work, even though the vehicle had warmed up sufficiently and temp gauge indicated such as well. 3) had to take to dealer since regular mechanic could not perform service; replaced actuator, blend door and other parts. (unk if replaced parts are available since dealer performed service repair.

- Nashville, TN, USA

I turned on my heat one day and it was only cold air. Took it to Jeep they said it was a blend door and a common problem.

- Reno, NV, USA

Dash creeks after vehicle is turned off. Both passenger and driver side vents blow cold air regardless set climate control temperature or if A/C is on or not. Defroster vents blow only cold air.

- Orem, UT, USA

Visibility: Defroster/defogger system:windshield:blower ventilation blend door failure.

- Plainfield, IN, USA

I have 2001 Jeep Grand Cherokee with electronic dual climate controls will eventually require major repair in order to cure hot air/cold air blowing from vents when they're not set to do so. The cost to repair this issue, which has been known to pop up again after another 50K miles after repair, is generally $800-$1500 from a dealership. Should you opt to do this repair yourself, the entire dashboard will need to be removed, quite the arduous process, and parts are approximately >$300.

- Clifton, NJ, USA

Passenger side of Jeep Grand Cherokee blows cold only cold air. Must be a popular problem. Repair cost exceed $1200 and a respectable dealer or repair shop. Updated 09/10/

- Utica, KY, USA

HVAC blend doors broken in a position such that only cold air blows from system. This allows for no defrost of any of the front windows posing a significant hazard during winter travel. This is the second of this body style Grand Cherokee (99-04) I have owned, and both vehicles experienced the same failure between 50K and 60K miles. The first vehicle (1999) was repaired by heritage Chrysler Jeep in ozark, mo for about $1300. The second vehicle (2001) has just experienced the same problem over last winter and is now in need of repair. I believe that this condition exists due to a poor design from the manufacturer and that the threat involved from potential limited visibility in the winter, coupled with the significant cost of repair and safety concerns, warrants a recall.

- Springfield, MO, USA

Loud creaking noises coming from the dashboard when I turn on the ventilation system.

- Worcester, MA, USA

Air conditioner vents and defroster vents no longer controllable via automatic thermostat. Blend door failure. I am unable to heat, cool, defrost, or ventilate the interior of the vehicle including the front defrost function. Inability to defrost the front windshield resulted in conditions unsafe for continued operation of the vehicle due to poor visibility.

- Gilbert, AZ, USA

Visibility: Defroster/defogger system:windshield:blower air conditioner (A/C heater ventilation component broke for no apparent reason. Dealer estimated $2000 for repair due to need for dashboard removal. Problem was blend door broke or damaged. Vehicle normally was running with A/C on, but now it sometimes did not work. Problem showed up after taking car for A/C service to Jeep dealership. Car is 2001 Jeep Grand Cherokee.

- Chula Vista, CA, USA

Blend door on air conditione/heater faied. It cost over $1000 to have fixed to get the heater back operational only to have it fail less than a year later which the dealership won't warranty.

- Canton, OH, USA

Ventilation system in 2001 Grand Cherokee blowing cold air and just not functioning. When windows were fogged the system will not clear window and could become a safety hazard.

- Machesney Park, IL, USA

Blend doors on ac system broke!!!!!!!!!

- Tullahoma, TN, USA

Passenger side vents emitted cold air when heat was on and wasn't functioning properly. Brought to mechanic who replaced failed activator at a costs of $787.50.

- Fawnskin, CA, USA

(1) - possibly weak plastic used during manufacturing (2) - failure on the climate control doors HVAC system in the my 2001 Jeep Grand Cherokee, causing the heating-A/C system to malfunction (3) - dash needs to be removed to access HVAC control box. Est. Cost form dealership is $1200 dollars. Removal of entire dash is required.

- San Dimas, CA, USA

On my 2001 Jeep Grand Cherokee limited climate control is not functioning properly. No matter what the setting is, it blows cold air from some vents and hot from others. The repair cost is estimated around $1200. The brakes were almost causing a loss of control while driving down the mountain road. The truck would start shaking violently as I apply the brakes, to the point where the steering was not affecting the behavior of the truck. Repair and part replacements cost $820. Outrageous!

- Glendale, CA, USA

We purchased a 2001 Grand Cherokee limited from a local dealership with 50,000 miles in may of 2005. No heat from both passenger or drivers side vents. Blend door hinges separated and inop. Recirculation door also inoperable vehicle had 53,500 miles at this time. Drivers seat heater failed at 65,000 miles. PCM failed at 75,000 miles and this was the only repair covered under warranty. The Jeep now has 81,000 miles and we have had vibration and pedal pulsation from the front brakes three times since we purchased the vehicle.

- Pacific, MO, USA

Blend door problems. Very cold air blowing instead of heat.

- Washington, DC, USA

Visibility: Defroster/defogger system:windshield:blower.

- Stroudsburg, PA, USA

A faulty blower motor resistor has rendered my heater from working. The temp is around 20 degrees and without the blower, I cannot defrost my windows to drive safely. The blower motor resistor is out of the vehicle with visual electrical charring. The wiring harness is also melted. I've talked to 2 different dealers and their parts department has dealt with this problem before. So, I contacted the Jeep customer service 800 number. But according to your "customer service" line, I need to get my vehicle back to the dealer so they can tell me what I already know. My question is why the blower motor resistor is back ordered 4,000-6,000 parts" and why if I take my vehicle back to the dealer, will I be expedited a part. Are they creating a demand by not supplying the part and then the dealers raise the price of the part" I have already had one dealer say that if they locate one, that it'll cost more than the price advertised on their web site. This is the worse customer service I have ever had.

- Lawrence, KS, USA