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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 35 of 52

#339 of 511 AC noise in dashboard by redtop2

Jun 10, 2009 (4:44 am)

Had to have the evaporator repllaced in 2002 8 cyl grand cherokee. Since then, there is a whistling/hissing noise in the dash when ac is on, every 20 - 30 seconds. Dealer tech says it's normal. Also, the condensate drain was blocked and my dash filled with water - had to have it back for that. I've never heard this before thru 3 jeeps or on this one before service. I just don't want to come back in 2 months with another expensive repair that was caused by this repair not being completed or being done incorrectly from the condensate line being blocked. Any ideas?

#340 of 511 Re: AC never works [bajawill] by blendor

Jun 18, 2009 (12:10 pm)

Replying to: bajawill (Jun 09, 2009 9:58 am)
You should have the proper equipment and follow the proper procedures to diagnose AC problems.
There are a few sensors that control the AC output, not just the compressor.
The next time take it to a professional AC repair shop – not just any auto mechanic.
 
After saying that, your fault codes of 52, 54, 56 are the three common fault codes for the 99/04 Jeep Grand Cherokee. They do show a Possible reason why you are only getting heat.
 
You said “I thought it was the Blending vents, I took the control off and manualy turned it, still no AC all just heat”
Does that mean you lowered the glove box, removed the actuator motor that is behind the glove box and that you turned the white drive connector?
If this is what you did and when turning, you turned it completely around. Along with the fault codes of #54 & 56 would confirm that you do have a blend door problem.
 
You symptom of only heat, is very odd for a blend door problem.
It could be possible but not normal as both the blend doors would have to be stuck in the up position, forcing the cold air to flow thru the heater core.
They normally fall and block the air from flowing into the heater core. Causing the common No Heat symptom.
 
If your fault codes are correct. You will have to replace the broken blend doors. If you want to save on the blend door repairs, you could do-it-yourself using one of the aftermarket access hole repairs. Then see what is happening with the AC.
 
Changing the blend doors might not help your AC problem, but replacing the broken blend doors will stop a future NO HEAT problem when the broken blend doors come loose and fall down blocking the air from going thru the heater core.
 
Good Luck,
Blen Dor

#343 of 511 '99 Grand Cherokee AC compressor clutch by sethybob

Jul 01, 2009 (11:38 am)

The clutch is sticking and at times won't engage at times without a little tap on the front of the pulley. Any recommended cleaning procedures for the clutch?

#344 of 511 2001 Jeep GC Limited AC only blowing hot air by danierob

Jul 04, 2009 (1:38 am)

Hello,
Here is my problem. I have a 2001 GC Limited V8. About a month ago when I hit the ac button it lights up but all I get out of all vents is hot air. It never cools down. I had the coolant checked, thinking that I needed to fill it and I was told that it was full. I remember hearing something click on when I pushed the ac button, maybe the compressor after reading some posts. I do not hear that noise anymore. Could this be a relay switch or fuse or am I in for some big bucks to get this fixed. Let me stress that I get no cold air but hot air blowing out of the all vents.
Thank you for any advice/help.

#345 of 511 2001 JGC A/C problems by lugnut42

Jul 07, 2009 (9:43 am)

I have a 2001 JGC V-6 w/ dual controls and when you turn the a/c on you can feel cool air but it won't blow. You can feel cool at the defroster, the vents and at your feet all at the same time. Is this a blend door problem?

#346 of 511 2004 Jeep Grand Cherokee AC problems by bradc1

Jul 15, 2009 (5:03 pm)

Sorry if this question has already been asked. I just bought a 2004 Laredo with a 4.0L. Strange AC problem is happening. The AC LED intermittently goes out. If i press the rear defrost button twice, it comes back on! took it back to the dealer. They found a cracked vacuum hose, but the problem still remains. It doesnt do it all the time, but it always seems to comes back when i hit the rear defrost twice. when the light goes out, it blows warm air. It blows cold air normally when the AC light is on. Any ideas??

#347 of 511 Re: Jeep GC Blowing hot air [skinsfan1] by rlipcz01

Jul 17, 2009 (8:01 pm)

Replying to: skinsfan1 (May 19, 2009 4:23 pm)
My wife has a 2003 grand cherokee laredo. The problems are the 3 control Knobs that control your air.$450. includes control knobs and to be on safe side the expansion valve. included recharging the system....... It took us 5 years to figure it out.....

#348 of 511 2003 Jeep problems by bradyr

Jul 20, 2009 (8:35 am)

I have 2003 GC limited 4w quadratrac with a few problems and any help would be appreciated as the dealers I take it to care only about money and creating new problems for higher payments. I have had the vent problems and heating problems and replaced twiced in 2 years. Now the heat/ac and temp. settings work fine but I only get heat/ac from the defrost or floor vents. I was told I need a new control panel for 750. Dont remember code numbers but more or less the two motors werent working directing the air flow. Next, there is a constant clicking when the car is turned on coming from behind the driver side dash- dealer couldnt tell me what that was--kinda funny. Next- at low speeds when turning- there is a whinning from the engine- possible belt problem was my first thought--a second opinion would help and last- when on the freeways and hitting the sectional gaps in the freeways- I fell heavy vibrations through the floor- (like hitting a metal poll with another metal object- the vibrations that go through your arm and hand) possibly shocks or maybe stablizer bar if there is one. Any help regtarding these few problems would be greatly appreciated as I somewhat like to know whats going on with my car before I take it anywhere...thanks again and have a great day.
 
Bradyr

Messages Page 35 of 52

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