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Jeep Grand Cherokee A/C Heating Ventilation

371 messages,  Last post on Oct 27, 2009 at 2:04 PM

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

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#335 of 371 Re: Jeep GC Blowing hot air [skinsfan1] by heatertreater May 19, 2009 (6:16 pm)
Replying to: skinsfan1 (May 19, 2009 5:48 pm) 15 and 53 are both driver's side blend door codes and this aligns with your symptoms. The codes indicate that the travel of the door is too small when the more common code would indicate that the door is traveling too far(54).   It sounds like the door is broken, but jammed such that it is constraining the axle. Either way, the diagnosis is definitive for blend door failure. The only component in the system that differentiates the temperature between the passenger and driver's side is the blend door, so you can be confident of the diagnosis.   There is a professionally designed aftermarket fix for this problem that is easy to install and will make a permanent repair to the system. Search the internet for installation video's and a site with more definitive information.   HeaterTreater
#336 of 371 Re: Jeep GC Blowing hot air [skinsfan1] by blendor May 19, 2009 (6:35 pm)
Replying to: skinsfan1 (May 19, 2009 5:48 pm) Glad you took my advice. It is much easier to diagnose your problem by reading the fault codes first.   15 = Left temperature door not responding This is a current code that indicates the driver’s side blend door actuator motor problem.   53= Left temperature door travel too small. This is a historical code that indicates the driver’s side blend door problem.   The driver’s side blend door actuator motor is behind the glove box. Easy to replace.   You have two options for the blend door repair. (1) Discharge the air conditioner, remove the dashboard and HVAC box, replace the blend doors. Replace the HVAC box and dashboard, recharge the air conditioner. The job should be completed within one to two days. (2) Do an access hole repair. No dashboard removal, the job will be completed in approximately one hour.   Blen Dor
#337 of 371 AC never works by bajawill Jun 09, 2009 (8:58 am)
I have been having AC problems for the last few years with my 200 Grand Cherokee Limited, 6 cylinder 4.0. I cannot even remember how many mechanics I have had work on it.   First the heat works great, to the point you can melt plastic with the vents.   The AC, we hooked up to pressure tester it cycles from low/no pressure to in the red zone, and them drops in like 6 seconds, repeats over and over.   I had the ac fan replaced no difference, I thought it was the Blending vents, I took the control off and manualy turned it, still no AC all just heat.  Oh codes show as 52 54 56 Any idea's?? Replies to this message: blendor (Jun 18, 2009 11:10 am)
#339 of 371 AC noise in dashboard by redtop2 Jun 10, 2009 (3:44 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 371 Re: AC never works [bajawill] by blendor Jun 18, 2009 (11:10 am)
Replying to: bajawill (Jun 09, 2009 8:58 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 371 '99 Grand Cherokee AC compressor clutch by sethybob Jul 01, 2009 (10:38 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? Replies to this message: sethybob (Aug 17, 2009 6:21 pm)
#344 of 371 2001 Jeep GC Limited AC only blowing hot air by danierob Jul 04, 2009 (12:38 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. Replies to this message: compton3 (Aug 18, 2009 4:25 pm)

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