The climate automatic climate control system has failed. One side blows cold air and the other warm air. The defrosters are ineffective, making it difficult to see when the windshield fogs up not to mention keeping the windshield deiced in bad driving conditions. Chrysler says the instrument panel must be removed in order to remove the heater assembly and fix the recirculation door and other components. They want $1200 to fix the heater! this is unbelievable!

- Loveland, CO, USA

HVAC doesn't change temperature. Blender doors are broken. Found out it's a common problem in 99-04 Jeep Grand Cherokee and they've updated the parts to replace. Problem is, labor costs around $1500 to fix the HVAC. There should be a recall for this as I can't drive in the winter without heat, won't be able to see while driving without a defroster!!!

- Virginia Beach, VA, USA

Visibility: Defroster/defogger system. Windshield blower. Cold air out the passenger side and visibility is decreased. I have had this fixed once when I bought the Jeep 6 years ago.

- Union, KY, USA

Visibility: Defroster/defogger system:windshield:blower.

- Brentwood, CA, USA

My 1999 Jeep Grand Cherokee limited w/42,000 miles. Yes. Not a typo. 42,000, orignal owner & "scared to death" to drive this SUV. I have alot of the already problems, that have been reported. Had to pay many, w/my own cash. This SUV schould have came in 1 color "lemon yellow". it is an accident watng to happen. The recent problem is now I have no A/C-heat or defroster. Ths is due, to failure of the automatic temp control to work. I T started 1st by intermittently working, till now not working at all, this is just 1 more, to the list, of many other problems. I don't think that it is an coincidence that all my issue have happenned, almost exactly, in the order, of all the other complaints. I can't undestand how a company can get away w/this. This new problem can cost up to $2000, if it is, like previous reported problems, happens to be the "blend doors". as a handicapped driver I drive less than 4,000 miles a year. This is the only auto I drive, thus the many, many probs have yet to raise thier head. I have read almost all complaints(too many to read) this SUV schould be a "total recall, I have never heard more complaints & problems, in my life, for any automobile. This SUV schould be studied & reseached, on "how not to build an automobile. Just read the many complaints here & on the internet. We are not making this stuff up. I don't know how they stayed in business as long as they did. We, the taxpayers, bailed them out. Who is bailing out all the owners, of this "death-trap"" if that is not absurd enuff, many problems could have been repaired, by Jeep & still can. What is the purpose, of nhsta, if not to intervene? you have all the complaints. Hundreds of them. You have them posted, yet, we taxpayers/owners safety, has been at risk ever since this SUV was driven out of the showroom. How did you not make a recall on the rotor/brakes issue which was reported at 3,000 miles? I am so frustrated. Is braking problems not a safety issue" please, help us!

- Farmingville, NY, USA

In just the last month we have lost heat completely in our Jeep. It start blowing out cold air on the driver side and now is blowing cold air on the driver side and passenger side as well as the defrosting vents all the time. We have no heat at all. We have not tried to repair it yet as it going to be costly.

- Centerville, IA, USA

1999 Jeep Grand Cherokee blend doors are failing to provide heat or defrosting. Concerned about visibility and numbness. Unbelievable amount of complaints on this to the company.

- Guilford, IN, USA

I have a 1999 Jeep Grand Cherokee and I noticed that my A/C blows mildly cold air. I recharged it thinking that it needed freon but that wasn't the case. This winter I noticed that my heat was not as hot as it should be. New england winters can get into the single digits and the lack of heat can make it almost impossible to defrost the windshield, making visibility very poor. After doing research on the web, I found out that my problem is all too common with Jeep Cherokee owners. It seems that Jeep have faulty blend doors made of cheap plastic and they almost all break. The repair requires removal of most of the dashboard and can lead to estimates leading anywhere between $1,000-$1,800. Daimler Chrysler is aware of the problem with the faulty devices and fails to accept the responsibility and post a recall on this issue.

- Somerset, MA, USA

I noticed that my air flow through the A/C and heater was not working - no air flow. It seems permanent - no air flow. I can hear the fan, but no flow of air - no matter what setting (defrost, floor, front side). What is worse, when my windshield fogs up, I have no visibility due to no windshield blower flow. I have not fixed it since it seems to be a widespread problem inherent with the Jeep design, and I believe Jeep should fix it.

- Coppell, TX, USA

1999 Jeep Grand Cherokee has cold air blowing out on the drivers side and dash board but has hot air blowing out on passenger floor side. I cannot defrost my windshield and this has caused me to pullover while driving du to loss of visibility. I performed various test and found that when testing the azc the fault codes I get are 47 = left temperature door not responding and 54 = left temperature door travel too large. After reviewing several sites and talking with a few mechanics it seems to be that the blend doors are broken. I cannot believe how many failures about this I have read and there is no resolution. This is something that is a safety hazard especially here in the northeast. I am also a firefighter and in the middle of the night when I am called to a fire, accident with someone trapped, or some other emergency, I expect my vehicle to work properly and at the least provide heat to defrost for visibility. I cannot understand why this has not been addressed and why it is not considered a serious failure. In these times of poor economy you would expect corporations to treat loyal Jeep owners with consideration and address their issues. I would like an answer as to why this has not been addressed and what is required to repair it. I am also sick to hear that dealers are charging over $1000 to fix a design flaw. I would hope you consider this an important issue because I consider my defroster important when I respond to rescue someone out of a burning building or cut them out of a tangled vehicle. Time and life is of the essence to save and I don't need to worry about not being able to get heat to defrost my vehicle. Thank you.

- Harleysville, PA, USA

I have a 99 Grand Cherokee and all of a sudden one day last March. The passenger side air started to blow out cold air and the driver side was blowing out cold. The temperature was both on 80. Now this winter. You can not get the heat to switch from the front vents to the floor or defrost.

- Des Moines, IA, USA

I own a 99 Jeep Grand Cherokee limited, and as I have come to find out my problem is all too common. In the middle of a freezing Nebraska winter the heat stopped working! not only is did my heater core go out, the apparently the "blend door" is also not functioning correctly. The combination of problems is likely to cost well over a thousand dollars to fix! after researching and finding out how common this problem is...I've decided I'll never buy a Jeep again! the of people this is happening to is unacceptable and something needs to happen otherwise I would advice every Jeep owner to get rid of their car before 75,00 miles. The problem can become dangerous because the defrost/defog function is completely gone when this happens, reducing or eliminating visibility.

- Lincoln, NE, USA

Heat and air worked fine. In October on a cold night I decided to use my heat and it blew cold air! this happens everytime I go to use my heat. It doesn't matter which vent it is blowing from the heat comes out cold. Has not fixed yet due to repair costs equaling over $1000 and I cannot afford that at the time. Guess I will just have to drive around in -8 temperatures with ice on the inside of my windshield..thanks Jeep

- Denver, CO, USA

I have had an issue with the heating and cooling unit on the dual zone control in the past, about 4,500 miles ago, and took it into the dealership to have them fix the problem. I took it into get repaired because it was not fogging or defrosting my vehicles windshield and I was unable to see during the winter when I was driving up to Colorado and had to stop every few minutes to wipe off the condensation. This was a terrifying event since it was snowing on the highway I was traveling on and there were vehicles trying to control their own vehicles which I could not see. At one point when I needed to pull the vehicle over and wipe off the condensation and unfreeze the windshield wipers from the windshield I was unable to see the railing and hit it, thankfully I was only going about 5 mph but I still banged up my bumper a little but at least I didn't die. This is an issue that is obviously due to the poor design of the vehicle since it has now gone out again in less than 5,000 miles. I cannot believe that daimler Chrysler has not recalled the parts that cause this problem and are waiting for someone to die from this design before they will do the right thing and recall. It costs more than $800 to repair the first time and I cannot afford to fix this issue just so that I can see the cars that are on the road and the lines to stay in my lane. Please help!

- Albuquerque, NM, USA

Blend door failure.

- Greenville, SC, USA

Visibility: Defroster/defogger system:windshield:blower -on a 1999-2004 Jeep Grand Cherokee.

- Garland, TX, USA

My 1999 Jeep Grand Cherokee limited's heater control unit has become faulty. The heat does not work on any setting, and outside cold air comes into the cabin with zero control. This is making visibility very poor due to lack of defrosting the front windshield. I brought it to the dealer, and they informed me that it was due to a poor "design" from the factory. They told me that it was going to cost $1,766 plus tax to repair this problem. I feel that there should be a recall issued to fix this problem seeing it becomes a safety risk due to poor visibility.

- New Britain, CT, USA

Blend doors on my 1999 Jeep Grand Cherokee failed, making it impossible to see in most weather (instant fogged windshield w/no way to defog) and blowing cold air instead of hot. This cost over $1000 to fix, as removal and replacement of the doors is very time-consuming (whole dash must be removed).

- Seattle, WA, USA

There is no heat from my passenger side in my 1999 Jeep Cherokee. I took it to the dealer it is the blend door very expensive to fix over $1200. I called Jeep and they know that there are problems but said they have not been told to recall. This is a safety issue the window fogs up and you can not see while driving!

- Pittsburgh, PA, USA

I ran into what I thought was a simple heating problem with my 1999 Grand Cherokee. One day while driving down the road, my car simply stopped blowing hot air. After going to the dealership and spending nearly $600 to have some sort of solenoid replaced, I realize after pulling out of the lot that only my passenger side will blow hot air. I called the dealership back, and they told me that it was a problem with the blend doors, and will likely cost between $1,000 and $1,500 to fix. The repair requires a complete disassembly of the dash and steering column (around 10-12 hours for a full repair, according to the shop). I began to look around online to see what else could be done. To my surprise, nearly every Jeep message board was flooded with posts about this exact problem. The engineering of the part virtually ensures that it will fail; the calibration phase (every 20 or so start-ups) forces the plastic part to its limits and eventually breaks. Every dealership or auto repair shop that I contacted said that virtually every 1999 and newer Grand Cherokee has, or will have, this problem. The issue isn't paying for car repair; every car has problems that we as consumers will need pay to get fixed. The problem is that the engineering of this part causes it to fail, and now I'm stuck not being able to defrost my windshield in the winter, or now in springtime when it rains. There is no doubt in my mind that this has already, or will cause in the future, accidents from people not being able to see. Many people, including myself, would rather drive down the road while wiping the windshield with a rag... than pay $1,500 to get it fixed. For many people, spending that $1,500 isn't even an option.

- Plainsboro, NJ, USA