Nine problems related to windshield have been reported for the 2004 Jeep Grand Cherokee. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Jeep Grand Cherokee based on all problems reported for the 2004 Grand Cherokee.
Failure of heating system components - blend doors. Regardless of temperature selected and fan output, design flaw in blend doors of heating system can result in no heat including no way to defrost / defog the front windshield, impeding driver's ability to see in cold weather. Faulty plastic parts break. Apparently this is a widespread problem with many Jeep models / years but no recall ever issued. Cost in excess of $1,500 to repair estimated.
While driving windshield began leaking at the top. Took the vehicle to glass repair company. Entire windshield was loose and could have fallen off at any time. Removed the windshield, cleaned the affected area and replaced the windshield.
Air/ defroster won't blow out any air at all or will blow out hot air on one side of the Jeep and cold air out the other side even though the settings are the same. This will happen on and off until it breaks totally. I have had mine fixed 3 times 12/29/06, 03/28/07, 06/08/09. You cannot defog/ defrost the windshield properly and keep it clear when you are driving. Each time the dealer replaced the faulty part housing a 240213290, actuator 24029001, housing a 2428025 and again housing a 24028025. This is a known issue for the 2004 Jeep Grand Cherokee and you can find a lot of talk on the internet about the cheap plastic parts that are used . You can find after market aluminum part but that's not what the dealer uses. This should not happen on a Jeep that only has 36,000 mile on it. . It's like its used alot. At $800. 00 a pop its starting to add up.
In cold weather,while using the windshield defroster,the hot air needed to keep frost off windshield suddenly changes to cold air on its own. This is very aggravating, and poses a great danger in not keeping the windshield clear. This happens very frequently. The dealership can make a repair, but the cost is prohibitive.
Hvac auto temperature system fails to maintain/sustain heat/cold. Occurs constantly when driven. Fails to keep windshield free of fog/ice which impairs vision. Not safe to drive.
Blend doors broken on passenger side so no heat comes from dash. No use of defroster on passenger side. . This cant be good for the windshield with hot and cold air blowing on it. Repair costs are ridiculous for a factory problem that many people seem to have.
During winter months, heat shuts off and turns cold. This happened during a snowstorm and I could not defrost the windshield. I consider this a serious safety issue. I had to stop engine, wait 5 minutes and start engine again. This has happened every time the car is driven. In the summer months, the reverse happens. Suddenly, the air conditioner suddenly throws out hot air.
Normal operation of heating/cooling system. Now, after 28,000 miles, temperature will suddenly change in the cabin of the vehicle. The heat will suddenly cease and the visibility will be lost out the windshield. I believe it may have something to do with "blend door". When the windshield frosts up, we have to pull over and turn car off and wait for system to reset. Very dangerous, not safe, dealership estimates $1,500 to $2,000 to repair.
Consumer complained about a leak in the frame of the windshield. Vehicle was taken to the dealer, who repaired the problem. However, after 1 night in the rain problem recurred. The dealer then replaced a piece of molding on the driver's door. The consumer stated that he was going to wait until the next hard rain to see if the vehicle is truly fixed.