Car Tech forum: 2002 Jeep Grand Cherokee AC Problem -- Simple Fix!

I have a 2002 Grand Cherokee with the 4.0 litre engine. For almost a year my air control and cruise controls have not worked as I thought it was an expensive fix. The air blew from the defrost and no cruise control.

I was actually looking for how to remove the panel from the vent controls when I stumbled across this post. After reading, I looked in the engine area and sure enough, there was a hose disconnected from the intake manifold on the driver side near the back.

Thanks for saving me a lot of money.

I have a 98 Grand Jeep Cherokee. My a/c will not blow out of the vents. It will blow very low on the circular vent only when I am going about 40 mph. It will not blow on any other vent knob. The blower and the condenser are both good - had them checked. Checked all the vacuum lines - nothing disconnected and no cracks. What else is the problem. It is so hot - help

Thanks for all of the good advise re vacuum lines that control the AC vents and the cruise control on a 2002 Cherokee. I fixed both problems for less than $3 instead of the $250 - $500 the dealership would have charged. I only have a couple of things to add: before you work your cachoobies off dismantling the battery box, check the intake manifold lines. That battery route is a real pain so save it for last. Also, when replacing the hoses connected to the manifold, either get a slightly larger size and use a hose clamp or be sure to try to stretch the hose and add some WD-40 in each end.

this is great. removed battery pan and found a vacume tube had fallen against my manifold and was melted apart about a 5 inch section . i cut it out and replaced with rubber gas line and now all works fine. thnks for info

Hi, I had the same problem with my Grand Cherokee Laredo 2004, the A/C Heater only blew through the defrost vent, and when I was as thinking about dissasembling the whole dashboard I found your posting, one vacuum hose came loose from the intake manifold too.I reconnect it and everything is back to normal.

Thanks a lot for sharing your problem and solution.
Regards
Ed

Before you take it to the dealership, check your vacum hoses under the hood.
Just like the thread says, on the driver side, there is a line that get loose, perhaps because of motor vibration.
if you are not sure which line, is the one that runs just below the black plastic of your windshield, from one side of the car to the other( the driver side), patience and you will find it.
It will save you money, I didn't even had to buy anything.
cost $0.

However, my car was having starting issues, I have a clifford 590.2x installed, that is another story.
Had it rewired, that was costly ($325), hopefully I am good to go now.

Next issue, tranny...
Good luck to anyone fixing jeeps, they are fun.

Wow, I cannot believe it the problem was the vacuume hose to the intake manifold. It was completely off and all I had to do was reconnect it and both vent and cruse control are working great! I drove around for a month in the hot summer thinking I was going to have to take it to the mechanic and spend lots of money, but no did not cost me anything!

Same problem, I think my vacuum canister broke. I friend took the line off the canister and plugged it with a bolt and the ac problem fix. He did this until I was able to fix my canister. But I new it was related to the vacuum line from this post thanks y'all