Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK2 - > Trouble Shooting/Problems/Service

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 07-09-2013, 08:36 AM
Member
 
Join Date: Nov 2012
Posts: 50
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 747
morty346 is on a distinguished road
Garage
2011 GC Overland v6 2wd - A/C Fan Continues to blow - but not through vents...

Driving quite a bit lately in the hot FL weather - requring heavy use of A/C. This has happened 3 times now:

After about an hour of driving with AC set to Auto 71 degrees (about 95 outside) I slowly notice a almost hissing noise... as if the air is being pushed through an aerosol can. -

I then notice that the air is only slightly coming out of the vents - the vehicle starts to warm up inside so I turn the knob to manually turn the fan all the way up - I can hear the fan get loud so I know the fan is working but the amount of air coming out of the vent is still barely any - I change it to floor, vent, defrost, turn heat on - change from outside air to inside air - nothing seems to fix it once it gets into this mode. Thought perhaps it was a software thing so turned off then turned back on car - didn't help.

Only thing that seemed to help was to turn the car off for about 10 minutes - then it kicked back in and worked the rest of the trip.

I checked fuses - and temperatures from computer and everything looks fine

Vehicle is going to dealer this week for scheduled maintenance - what can I bring to light to help me explain this better to them, or has anyone heard of this happening that could help me out?

Thanks!

Greg
__________________

__________________
Reply With Quote
  #2  
Old 07-09-2013, 09:44 AM
padgett's Avatar
Premium Member
 
Join Date: Feb 2012
Location: Orlando
Posts: 1,554
Thanks: 0
Thanked 24 Times in 21 Posts
Rep Power: 80206
padgett has a reputation beyond reputepadgett has a reputation beyond reputepadgett has a reputation beyond reputepadgett has a reputation beyond reputepadgett has a reputation beyond reputepadgett has a reputation beyond reputepadgett has a reputation beyond reputepadgett has a reputation beyond reputepadgett has a reputation beyond reputepadgett has a reputation beyond reputepadgett has a reputation beyond repute
Re: 2011 GC Overland v6 2wd - A/C Fan Continues to blow - but not through vents...

That sounds like the evaporator is icing up and blocking flow. Turning on max heat for a few minuites may help.

Since a non-smoker I use the recirc almost constantly and have not had it happen including up and back from NC.

There are two usual causes of icing up:
1) low refrigerant
2) blocked flow (if a 2011 have you changed the cabin air filter behind the glovebox ?)

ps hissing is probably just before the evaporator blocks completely. Is the little flow you feel ice cold ?

pps have seen mention that recirc causes icing. I do not believe that is true, at least not in a high humidity area.
__________________

Reply With Quote
  #3  
Old 07-09-2013, 08:03 PM
Premium Member
My Jeep: 2014 3.6L WK2
 
Join Date: May 2013
Location: Warriors Mark, PA
Posts: 44
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 584
Mark090852 is on a distinguished road
Re: 2011 GC Overland v6 2wd - A/C Fan Continues to blow - but not through vents...

Quote:
Originally Posted by padgett View Post
That sounds like the evaporator is icing up and blocking flow. Turning on max heat for a few minuites may help.

Since a non-smoker I use the recirc almost constantly and have not had it happen including up and back from NC.

There are two usual causes of icing up:
1) low refrigerant
2) blocked flow (if a 2011 have you changed the cabin air filter behind the glovebox ?)

ps hissing is probably just before the evaporator blocks completely. Is the little flow you feel ice cold ?

pps have seen mention that recirc causes icing. I do not believe that is true, at least not in a high humidity area.
I agree. It sounds like the evaporator ices up and totally blocks the flow. I had a BMW that used to do that during high usage with high humidity. The best fix for us was to turn off the AC and just run the fan for a few minutes. The ice would melt and flow would return to normal. Eventually there was a fix from the dealer. I think the fix just automatically shut down the AC for a few seconds on a regular basis, to prevent the ice from building up.
__________________
2014 Grand Cherokee Limited, True Blue, Morocco Black, 3.6L, ORAII, 8.4AN, Sunroof
Reply With Quote
  #4  
Old 07-19-2013, 10:11 AM
Member
 
Join Date: Nov 2012
Posts: 50
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 747
morty346 is on a distinguished road
Garage
Re: 2011 GC Overland v6 2wd - A/C Fan Continues to blow - but not through vents...

Update to the issue:

was the sensor inside the AC unit - apparently goes bad after about an hour of driving so they replaced it - will see if it happens again

apparently an unusual sensor to go bad so they had to order it -
__________________
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Anybody have a 2007 Overland CRD 2WD? Crashtown Diesel Powered WK Grand Cherokee 6 06-27-2014 11:42 AM
Cold AC From Drivers Vents, Warm From Passenger Vents Quarterwave Troubleshooting/Problems 8 06-09-2013 02:31 PM
Fan will only blow on HIGH OnedoubleL Troubleshooting/Problems Discussion 8 10-28-2011 01:47 PM
WK2 - Grand Cherokee Overland Hood Vents Hasan Grand Cherokee - WK2 - 6 09-28-2011 03:39 PM
Review of 2011 JGC 5.7L 2WD cshjgc Grand Cherokee - WK2 - 0 01-28-2011 10:54 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 11:24 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community