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Jeep Grand Cherokee A/C Heating Ventilation

511 messages,  Last post on May 23, 2013 at 8:57 AM

You are in the Jeep Cherokee and Jeep Grand Cherokee Forum.

What is this discussion about? Jeep Grand Cherokee, Heating / Cooling, SUV

Messages Page 43 of 51

#421 of 511 Air blowing hot air by tiredofmyjeep

May 26, 2010 (8:34 am)

I have a 1996 Jeep Grand Cherokee I call the money pit. We had to get the transmission fixed a couple months after we got it, We had the water in the passenger floorboard and changes a heater core (that was fun), found a hole without a plug on firewall, and finally figured it must be the drain plug on a/c. That was very interesting to find. We fixed it when we located it but not by the means mentioned here. (ours was much more difficult) Funny thing is the previous owner must have thought it was something else because there was lots of stop leak in the radiator over fill thing. That was fun to attempt to clean. Wish I would have been here sooner. Water pump has also been changed.
 
Problem now is the A/C blows hot air. The heat works decently but not on floor setting. When you are driving and accelerate it just switches itself to the windshield vents until you let off on the strain you seem to be putting it in. If you turn it to vent it is hot too. Can anyone help solve my problem? I do not have the dual control that has been mentioned.
 
Help .... this thing is breaking me but its paid for and that is why I keep it.

#422 of 511 Re: Air blowing hot air [tiredofmyjeep] by blendor

May 26, 2010 (11:59 am)

Replying to: tiredofmyjeep (May 26, 2010 8:34 am)
Hello Tiredofmyjeep:
 
Your symptom of the air flow changing locations on acceleration, sounds like a mode door problem.
 
Your AC blowing hot air, could be from a minor leak in the AC system that would only require a recharging - to a sensor in the transmission.
 
Some repair manuals will give a few tests to do on your own, but if they are not the problem, you could be wasting your time or changing parts unnecessarily.
 
To diagnose the AC you need the proper equipment for testing the system.

#423 of 511 Re: Air blowing hot air [blendor] by tuggajb

May 26, 2010 (3:33 pm)

Replying to: blendor (May 26, 2010 11:59 am)
sounds as if you have a vacuum leak there is a hose that goes under your battery to the front of the jeep to a canister check that I would change it as is getting old and dont cost that much for hose

#424 of 511 2005 JGC a/c compressor cycles on/off by 2005jeannie

May 28, 2010 (6:25 pm)

Unit was blowing cool to warm air. Last night added 14oz can of freon. Today, 95 degrees outside, a/c blows barely cool air. Tonight tried to add more freon,with the charging & measuring kit. This gauge registers in warning zone 70-80 as I try to add the freon. Compressor kicks on, runs for a few seconds to almost 45 seconds, then shuts down. Engine has been running for several minutes now and the a/c is blowing warm air, no cool air what so ever. What do I do now?

#425 of 511 2001 JGC Radiator fan & A/C problem by kmckenzie

Jun 05, 2010 (6:44 pm)

- Radiator fan has stopped working. Jeep will overheat if sitting still, but is just fine when moving. Any ideas?
 
- A/C is only blowing out of defrost vents no matter what the dial is set at
 
Any help on these would be much appreciated.

#426 of 511 1999 Grand Cherokee Overheats Only When A/C On? by woodog

Jun 06, 2010 (4:50 am)

My 1999 Grand Cherokee Limited overheats only when the A/C is on. I replaced the thermostat before actually analyzing the problem, but have determined it is only when A/C is on. Any ideas?

#427 of 511 Re: 1999 Grand Cherokee Overheats Only When A/C On? [woodog] by tuggajb

Jun 07, 2010 (5:05 am)

Replying to: woodog (Jun 06, 2010 4:50 am)
ose electric fan come on when you turn on ac

#428 of 511 Re: Air blowing hot air [tiredofmyjeep] by socaldon

Jun 07, 2010 (10:22 am)

Replying to: tiredofmyjeep (May 26, 2010 8:34 am)
Mine is doing a similar thing - air is nice and cold until I drive up an incline (I suppose the engine is under strain so this is the same symptom as yours). The air just switches itself to the windshield vents until the road levels out. I did have problems with the vacuum tube but managed to fix that - only have the problem on hills now.
 
I haven't got a cure as yet but am working on it - will report back if i find the answer.

#429 of 511 Re: 1999 Grand Cherokee Overheats Only When A/C On? [tuggajb] by woodog

Jun 07, 2010 (11:42 am)

Replying to: tuggajb (Jun 07, 2010 5:05 am)
The fan comes on when it starts to overheat, but I don't believe it does simply by turning on the A/C - I'll have to check that.

#430 of 511 Re: 1999 Grand Cherokee Overheats Only When A/C On? [woodog] by tuggajb

Jun 07, 2010 (11:56 am)

Replying to: woodog (Jun 07, 2010 11:42 am)
needs to come on when you start ac

Messages Page 43 of 51

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