Question about 1996 Jeep Grand Cherokee

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Location of the air conditioner vacuum hose - 1996 Jeep Grand Cherokee

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Look where the ac lines go threw the fire wall is there a small black line there as well

Posted on Nov 23, 2013


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My air conditioner blows air out on top by the window and on the floor but not in the middle on the dashboard. What part do i need to fix this and where is it located in the dashboard or under the hood?...

  • If the AC/heater air control doesn't work, you most likely have a vacuum line broken. All the air flow doors in the heater system are vacuum operated and without it the air will blow out of the windshield defrost vents. The common place for a vacuum line to break is under the hood where the lines pass near a hot area. The vacuum lines are normally a rigid black plastic tubing about 3/16 inch in diameter. They run across the engine compartment fastened to the section just below the wipers and air vent. The tube goes through the dash, usually near the steering column. When the tubing has been hot for long time it becomes brittle and cracks or breaks. Trace this tubing looking for a crack or break. The easiest repair is to cut out the broken section and replace it with rubber hose of the correct diameter. The hose needs to have an inside diameter that will fit snugly on to the vacuum tubing.

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Jul 26, 2011 | 1996 Buick Park Avenue

1 Answer

Lancer low idle when air conditioner on. 2003. What should i look for?

Look for the aircondition actuator, located alongside at the end of the accelerator cable. Its a rounded metal canister type, it is operated by vacuum from the intake manifold. The vacuum is controled by a solenoid valve that when you turn on your A/C it open the valve and let the vacuum sucks the actuator.
Check the actuator of its vacuum hoses that might been disconnected or already have cracks/cut off, thus vacuum leaks.
If the vacuum hoses are okay, you have to adjust the shaft in the actuator, it pushes your idling up, the shaft has an adjustable nut and can be adjusted to your preffered idling setting.
Hope that helps you out!
Thanks for using Fixya!

Dec 08, 2010 | 2003 Mitsubishi Lancer

3 Answers

Air conditioner and heater work only intemittently

bad vacuum line... with engine running open hood and listen for a hissing sound....check all vacuum hoses for cracks then replace them... also listen under the dash inside the car

Oct 13, 2009 | 1997 Mercury Sable

1 Answer

Air conditioner in my 1999 Ford f-150 only blows out the defrost

Look around under the hood for a broken or dislodged vacuum hose. The door that directs the air flow is controlled by vacuum and after 10 years those hoses get brittle.

Sep 29, 2009 | 1999 Ford F150 Regular Cab

1 Answer

Air conditioner blows hot air

this can be a few different things going on. 1. does the clutch on your compressor engage when a/c is turned on? If so, does it cycle on and off constantely? If its cycling, your low on refridgerant, which indicates that theres a leak. System needs to be checked by professional. If compressor stays on, and you got hot air, it indicates that the problem is with the heater control valve. Normally, this can be found connected to one of the heater hoses located on passengerside engine compartment. It might be electronic, or vacuum operated.

Jul 13, 2009 | 2000 Chevrolet Blazer

2 Answers

The air conditioner is working quite well, but when I accelerate, the cool air comer out from the top of the dashboard openings instead of the air conditioner openings. How can I fix this problem??

1-it sound like you have a vacuum hose off, are a hole in the hose, causing it to lose vacuum making the dapner open toward the defroster vent. Are you could have leaves & trash in your duct box, not letting to open all the way open. Thrusting the air back up top???

Jan 30, 2009 | Jeep Grand Cherokee Cars & Trucks

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

Air conditioning

Yes you could, all you have to do is to locate a faulty or loose or broken vacuum hose under the hood......that is all the problem you have.......

Jul 01, 2008 | 1995 Ford Bronco

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

3 Answers

Air conditioner in 2005 jeep wrangler x

Yeah, I would go up hill or pull away from a stop and the A/C would cut out and then come back once my speed was stabilized. It was a vacuum hose leak !! This mostly affected the upper dash blower fan.

May 31, 2008 | 2005 Jeep Wrangler

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