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Comments
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
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
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??
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
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.
Bradyr
I saw this question earlier in the thread but could find no replies. I have a 1997 JGC 4x4 V8 and, whilst the air conditioning seems to work, the air will only blow onto the windscreen. It doesn't matter what the control is pointing at - it refuses to blow air out of the vents.
Any ideas? Thanks in advance.
Dave
Burbank, CA - a little toasty round here so help would be appreciated!
good luck
Find out where it has broken and fix it! Now have all the cold air I can handle.
Good luck!
I had another situation back in 01/28/06 Kirby Olds-Jeep Suzuki $13.08 Purchase Gasket and Thermostat (this is on the "if this happens to you" page of a service thing,... it was not on a "recall list" and of course not on a warrantly... that price was for the part itself and my mechanic at the time fixed it for free since I was getting a lot of work done at the time.)
Either one of these may fix the problem...or at least for a little while. I am having a problem kinda like this gain so I am going to my mechanic tomorrow because my a/c is now intermittantly blowing when I let off the accelation.
Thanks,
Rickey
if you drill a small hole on the edge that faces the seat you can then clean out the botom of the valley with a wire the hole can be 1/2 inch so can get it cleaned out then find a rubber plug at peb boys that will plug the hole you drilled (would find the plug first then you know how bigto drill hole) BE carefull when you drill so as not to hit evap core
Before dogging the repair guy.
You should have an idea of what is wrong with your system.
It might not be the repair guy’s fault.
Coincidence does happen!
It could be a faulty actuator motor, etc.
If you have the dual control heating system, then the first thing you should do is read your fault codes.
You can also check a few problems manually.
The fault code system is an excellent place to start the diagnosing process.
IF you have the Automatic Zone Control system (AZC)
The first thing you should do is check the AZC fault codes.
To read the fault codes:
1. Turn on the ignition switch.
2. Turn on the AZC system. The temperature settings should be displayed for both sides.
3. Simultaneously hold down the AC and the Re-Circ buttons.
4. Then turn the driver’s side temperature (Left) control knob to the right (CW) one click.
5. Then release the AC and Re-Circ buttons.
If there are no fault codes, the “00” display value will remain in the window.
If there are any codes, each will be displayed for one second in ascending numerical sequence. Once all codes have been displayed, the system will repeat the fault code numbers. This will continue until stop the process by moving the left side set temperature control one click in either direction, by pressing both the A/C and Recirc buttons at the same time, or the ignition is turned off.
Record all of the fault codes and also describe any symptoms you are having with your heating system.
Like - Are you getting a good air flow thru your vent outlets?
Can you direct the air flow to the different outlet vents?
Post your fault codes and symptoms.
I’ll interpret them for you and advise you on what I think the problem is.
Merry Christmas
The center vents seem to blow a normal amount of air but the side vents are very weak.
Thanks in advance for any suggestions
How do I test the voltage my fan is drawing?
How do I determine whether the fan motor or resistor is what's bad?
I will try the method above for getting codes first thing in the morning and reply ASAP. Any ideas or suggestions would be greatly appreciated.