Question about 1999 Jeep Cherokee

1 Answer

Air stops blowing

Every time i accelerate my a/c stops blowing. i am trying to locate the vacuum hose on my 1999 jeep. can you help?

Posted by on

  • jrod5500 Jul 19, 2008

    your help would greatly be appreciated. thanks

  • Chris Ski
    Chris Ski May 11, 2010

    How do you know it's the vaccum hose?..I have a 99 and mine stopped blowing, and it was the sensor that tells the a/c clutch to disengage at certain throttle loads. Just FYI



1 Answer

Make sure your radiator fan is working! I had the same problem to find out radiator fan wasnt working. I got the fan working and now my a/c works excellent.

Posted on Sep 06, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Why does my jeep accelerate all the way when starting it up?

To much air getting in. Vacuum leak, slow operating throttle body, may need cleaning etc. Listed for an air leak under hood when it starts.

Sep 07, 2014 | 1999 Jeep Wrangler

1 Answer

AC/Heater blower fan stops blowing air into the cabin when I accelerate.

Usually a vac leak. I would check for a leak in the HVAC control system and the line thru the firewall to the engine.

Aug 17, 2012 | 1998 Jeep Grand Cherokee

1 Answer

2001 Ford expedition A.C. work for the rear of the car but not the front, sometimes air blows out but as I accelerate the air stops blowing as I remove my foot from the accelerator it continues blowing,...

This sounds like a vacuum problem. Check your vacuum hoses and connections as they relate to the HVAC system. There is a good chance that you have a cracked, broken, or disconnected hose, or a hose that collapses.

Aug 22, 2010 | 2001 Ford Expedition

1 Answer

My 1996 Jeep Cherokee 4L 6CYL heater stops blowing and defroster starts blowing when the engine is under load. Let off the gas and the heater starts blowing again. I think it miught be a vacuum leak... Any...

Vacuum leaks can be identified by spraying small amounts of carburetor cleaner around the vacuum lines/hoses & connections. Any area that sucks in the carb cleaner will cause the engine to idle slower for a few seconds. Spray sparingly & allow to dissipate/evaporate between spraying to prevent any possible fire danger. The problem you are describing could also be the vacuum resivoir having a crack in it, it usuall stores enough vacuum to allow acceleration without affecting the heater controls as yours are being affected. this is usually a cannister or a black plastic mounted ball shaped device that has vacuum line(s) leading to them located on the fenderwells. good luck

Jan 30, 2010 | 1996 Jeep Cherokee Sport

1 Answer

Jeep AC blows cold air at defrost and feet but not through vents

There is a flap that directs the air. the flap is controlled by a vacuum actuator. This is located inside the venting. The actuator is connected to little vacuum hoses that attach to the temperature control switch. Either the flap is stuck, or the actuator has gone bad.

Jul 01, 2009 | 1999 Jeep Grand Cherokee

1 Answer

Having problems with my a/c on 99 lincoln navigator. At times a/c will blow cold air, as soon as I hit the the accelarator I hear a sound that resembles the closing of a vent and it immediately blows hot...

Typical ford Check on the firewall for all your rubber vacuum hoses where the heater hose goes into the firewall if one is broke as you accelerate the vacuum makes the heater switch open giving you heat

Jun 03, 2009 | 1999 Lincoln Navigator

1 Answer

Air conditioner problems

If the air blows from the derfost and the footwells, then their may be a vacuum leak. Check under the hood there should be a vacuum line that goes from the firewall to a vacuum port on the intake manifold. Alot of times the line get corroded and breaks off.(If you find the pcv hose you are in the right direction)

Dec 16, 2008 | 1999 Chevrolet Tahoe

1 Answer

Regal air conditioner blows out top vents

Sounds like a vacuum leak. The vents work by using vacuum to open them. When you accelerate the vacuum goes away and the vent door closes into it's resting position. Look under the hood for old brittle vacuum hoses or possibly one got knocked off during maintenance. Another possibility is a vacuum hose knocked off at the climate control maybe during aftermarket radio installation. It could be a bad climate control too because your always moving the lever, over time the control could be worn out and leaking vacuum. Fianlly it could be the actual actuator/piston that moves the vent that could be leaking.
If your lucky maybe you can hear the leak while the car is running, also when you turn off the car and listen (it might not be that loud so do it in a quiet location) for a 'sucking/blowing' if its a big leak it may happen quickly.
For a cheap fix if you can't find the leak you can install an additional vacuum reservoir. It won't make the problem go away but with the additional vacuum storage it will take longer before the vents loose vacuum.
Way back when, car makers used metal HI-C (the juice) cans, now you'll find a black ball about 3-5 inches in diameter as the vacuum reservoir.
Tip: You can use a short piece of hose put up to your ear, block your other ear and move the other end of the hose around the engine compartment to locate leaks or other noises you can't figure where there coming from.

Jun 29, 2008 | 1995 Buick Regal

Not finding what you are looking for?
1999 Jeep Cherokee Logo

Related Topics:

133 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts


Level 3 Expert

77939 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

Kevin Daniels

Level 3 Expert

1455 Answers

Are you a Jeep Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides