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Blower fan intermittent speeds?

22K views 18 replies 12 participants last post by  shift6 
#1 · (Edited)
I bought a 2011 GC in August while it was still warm out here in Wisconsin. As it started to get colder I started to use the heat and front defrost more and more. So I don’t know if it will do it with the air-conditioning too. But what’s happening is I will have the blower fan on full blast and when I put the GC in drive or reverse the blower fan will slow down. When I come to a stop sign and make a 90 degree turn the fan will blow harder again when the gas is pressed during the turn but slow right back down as the wheel is straightened out. It usually happens within the first few minutes of driving.

The other day it was -21 out and I remote started the GC. It ran for about 10 minutes when I got in it but it was still cold. The blower fan had completely stopped working. I hit every button on the counsel put it into auto back to manual and still nothing. I drove my son to school then straight to the dealership. It ran for about an hour from the time I remote started till I got to the dealership and pulled it into their heated service area. It set in the heated area for a half an hour then it was pulled out to the lot and sat for several hours. When they started it to pull into a stall, the heater fan suddenly worked again. So they gave it back to me and emailed Chrysler about it to see if they had any information. Still haven’t heard anything from Chrysler and the intermittent fan speed is still happening.

The mechanic tried to tell me it was the auto climate control but it is almost never in auto its always in manual. Anyone else experiencing anything like this?
 
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#4 ·
Mine actually blows harder during acceleration I have never had it quite on me but the one time for an hour.

Fortunately I'm dropping it off tonight at the dealership to have the key fob and acceleration lag fixed that were in TBS 08-023-10 REV. A and 18-026-10. Being that the heater speed reacts to the accelerator I am hoping the PCM flash that fixes the acceleration lag takes care of it. I really doubt it will but I can always hope.
 
#9 ·
Mine actually blows harder during acceleration I have never had it quite on me but the one time for an hour.

Fortunately I'm dropping it off tonight at the dealership to have the key fob and acceleration lag fixed that were in TBS 08-023-10 REV. A and 18-026-10. Being that the heater speed reacts to the accelerator I am hoping the PCM flash that fixes the acceleration lag takes care of it. I really doubt it will but I can always hope.
I reviewed TSB 18-026-10 its for SAG/HESITATION at launch. Can you describe what it means? I have felt that whenever i get On Ramp and try to accelerate, it feels it lags just to get to 40-50mph. Is this something related to this TSB?
 
#5 ·
I am not sure if this is the same issue, but sometimes when accelerating, and my blower (on medium speed) is on FLOOR only, it will shoot/blast out the DEFROST on high for a second or two, then go back to what it is set on. Any ideas/thoughts?
 
#6 · (Edited)
Just had mine @ westbury jeep for the same problem....tech had to flash the computer....its only happened 1 time since a very short delay so i need to report it He referred to a part called a control head which would be the other suspect cause its on national back order.....................pat........ Its somehow linked in the same circuit as the electronic throttle...flying dutchman same issue thats how mine started out
 
#12 ·
Hey guys..new here. I found this forum while researching the fan speed issue. My WK2 Limited V6 has a build date of 12/10.

I took the car to the dealer yesterday for the issue, and the tech had no idea what was going on. He agreed that there's an issue but also stated Chrysler has no fix for it at this time. He said to keep checking back.

I first noticed my issue when putting the car into gear from Park or Neutral. The fan speed either slows or the diverter/blend doors send the air to another location...I can't tell yet.

I too notice erratic fan speed when accelerating/decelerating. It's REALLY annoying me. :(

Glad I found this thread though...
 
#13 ·
So I took the truck in to the dealer on Saturday, and like I expected, the tech couldn't find anything "wrong". I sat in the truck with him and showed him what I was talking about, and he did acknowledge the issue and agree that if that's the way the truck is supposed to be, the logic is stupid.

He hooked whatever the Chrysler scan tool is to the truck and confirmed that all my modules/software were current. No TSBs or any other notices from Chrysler concerning the issue.

We went out and tested 2 other WK2s in the shop and they all did the same thing. We also checked a new, unsold Overland, and it did it too.

He and the service writer said to keep doing my research online, and maybe if enough people raise the issue, Chrysler will issue a fix sometime in the near future.
 
#15 ·
I thought that I'd add to this old thread instead of starting a new one since it doesn't seem that Jeep has come up with a fix for this yet. My 5.7L Overland does it too. It's much worse with the A/C in the summer than it was with the heater in the winter. It was just occasional before, but now the blower fan is changing speed every time that I change the position of the gas pedal now, it started yesterday at the beginning of the long holiday weekend, so I can't even call my dealer until Tuesday. I'll try to find out if they think that they've got a fix for it yet.
 
#17 ·
Mine does the same thing.
 
#18 ·
I finally got mine in to the dealer last week for this issue and they applied TSB 24-004-11, which they said addresses this exact issue. It still does it, but mine is a 5.7L and the TSB that they applied, while it's supposed to fix a number of things for all WK2's, is only supposed to fix the intermittent blower speed on the V-6 version. So I'm back to square one. I'll be calling the service department again to set up another appointment when I have some spare time.
 
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