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 01-02-2012, 08:03 PM
Member
 
Join Date: Dec 2011
Posts: 24
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1119
dxrdxr is on a distinguished road
How do I turn A/C compressor off

I have a new 2012 Overland V8. I am new to Chrysler A/C controls. According to the owners manual there is really no way to disable the A/C compressor. I see there is a dedicated button for A/C but according the the manual the below appears

"If the system is in Mix, Floor or Defrost Mode, the A/C can be turned off, but the A/C system shall remain active to prevent fogging of the windows."

How can I assure the A/C compressor is not active for cold weather us?
Thanks
__________________

__________________
Reply With Quote
  #2  
Old 01-02-2012, 09:18 PM
Suther's Avatar
Member
My Jeep: 2012 3.6L WK2
 
Join Date: Sep 2011
Location: Kalenborn
Posts: 231
Thanks: 25
Thanked 7 Times in 7 Posts
Rep Power: 17208
Suther has a reputation beyond reputeSuther has a reputation beyond reputeSuther has a reputation beyond reputeSuther has a reputation beyond reputeSuther has a reputation beyond reputeSuther has a reputation beyond reputeSuther has a reputation beyond reputeSuther has a reputation beyond reputeSuther has a reputation beyond reputeSuther has a reputation beyond reputeSuther has a reputation beyond repute
First of all, no definite answer but my previous experience and knowledge is that the compressor stays off if the temperature is below a certain degree (on my Passat it was 5 degrees Celsius). That prevents the ice buildup in the condenser. With that there is really no need to switch the compressor off. In contrary if it is too long off there is no circulation in the hoses which is necessary circulate the oil and prevent diffusion of the r134.

Hope that helped.
Alex
__________________

__________________
_____________
2012 Limited V6 4x4
Mineral Gray
Tow Package, Skid Plates, Tow Hooks, Tubular Side Steps, Mud Flaps, Underbody Protection
Planned: headlight washing system, amber rear blinker, rear fog light, change amber parking lights to whites, lockpick, front camera, swap RBZ to RHW
Reply With Quote
  #3  
Old 01-02-2012, 09:31 PM
Member
My Jeep: 2012 5.7L WK2
 
Join Date: Oct 2011
Location: Avon, CT USA
Posts: 204
Thanks: 0
Thanked 5 Times in 5 Posts
Rep Power: 1595
PECo has a reputation beyond reputePECo has a reputation beyond reputePECo has a reputation beyond reputePECo has a reputation beyond reputePECo has a reputation beyond reputePECo has a reputation beyond reputePECo has a reputation beyond reputePECo has a reputation beyond repute
Re: How do I turn A/C compressor off

dxrdxr - Why would you want to disable the A/C compressor in any car? The reason it stays on during cold weather is to dehumidify the air, which helps prevent condensation on the inside of the windows.
__________________
2012 Jeep Grand Cherokee Overland 4x4 5.7L ORAII Mineral Gray Dark/Light Frost Beige
Reply With Quote
  #4  
Old 01-02-2012, 10:14 PM
Member
 
Join Date: Dec 2011
Posts: 24
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1119
dxrdxr is on a distinguished road
Re: How do I turn A/C compressor off

Mainly gas mileage and power. But another way of asking the question would be what is the A/C button for if it does not deactivate the compressor at least in some airflow mode. Thanks for the feedback
__________________
Reply With Quote
  #5  
Old 01-03-2012, 05:17 AM
Premium Member
My Jeep: 2011 3.6L WK2
 
Join Date: Sep 2010
Location: Indianapolis
Posts: 275
Thanks: 0
Thanked 7 Times in 4 Posts
Rep Power: 1842
IndyBob has a spectacular aura about
Re: How do I turn A/C compressor off

Quote:
Originally Posted by dxrdxr View Post
Mainly gas mileage and power. But another way of asking the question would be what is the A/C button for if it does not deactivate the compressor at least in some airflow mode. Thanks for the feedback
I may be wrong but if you are NOT in Auto mode for the climate control then the AC button will control the compressor. If you are in Auto mode then the system controls the compressor. At least that is the way it seems to work on my 2011.
__________________
Reply With Quote
  #6  
Old 01-03-2012, 07:12 AM
Member
My Jeep: 2011 3.6L WK2
 
Join Date: May 2011
Location: Massachusetts
Posts: 305
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1632
hammer1234 is on a distinguished road
Re: How do I turn A/C compressor off

I have had some cases where the windows fog in auto temp mode...would this be normal? I usually change to a mode where the front defrosters are active and it goes away...but I thought that the A/C would always run in auto mode.
__________________
Reply With Quote
  #7  
Old 01-03-2012, 08:43 AM
Member
My Jeep: 2012 5.7L WK2
 
Join Date: Nov 2011
Location: perry hall, maryland
Posts: 428
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 1756
peckmv has a reputation beyond reputepeckmv has a reputation beyond reputepeckmv has a reputation beyond reputepeckmv has a reputation beyond reputepeckmv has a reputation beyond reputepeckmv has a reputation beyond reputepeckmv has a reputation beyond reputepeckmv has a reputation beyond repute
Re: How do I turn A/C compressor off

Quote:
Originally Posted by Suther View Post
First of all, no definite answer but my previous experience and knowledge is that the compressor stays off if the temperature is below a certain degree (on my Passat it was 5 degrees Celsius). That prevents the ice buildup in the condenser. With that there is really no need to switch the compressor off. In contrary if it is too long off there is no circulation in the hoses which is necessary circulate the oil and prevent diffusion of the r134.

Hope that helped.
Alex
I fail to see how ice would build up in the condenser. There should be no moisture in the system at all. The condenser has hot gasses run through it so it can condense those gases to a liquid. It is adventagous to have the compressor run occasionally during the winter months so the seals in the compressor can remain flexable and the valves can be exercised. This helps the compressor life. Oil migrating through the system is the way its designed. Oil tends to migrate towards the hot side of the system and is inherant on lubricating the compressor. If you have icing then you have a problem that should be looked into.
__________________
Reply With Quote
  #8  
Old 01-03-2012, 09:28 AM
ekaz's Avatar
Member
My Jeep: 2009 7.0L SRT8
 
Join Date: Oct 2009
Location: Chicago
Posts: 566
Thanks: 1
Thanked 11 Times in 10 Posts
Rep Power: 2688
ekaz has a reputation beyond reputeekaz has a reputation beyond reputeekaz has a reputation beyond reputeekaz has a reputation beyond reputeekaz has a reputation beyond reputeekaz has a reputation beyond reputeekaz has a reputation beyond reputeekaz has a reputation beyond reputeekaz has a reputation beyond repute
Re: How do I turn A/C compressor off

Quote:
Originally Posted by dxrdxr View Post
Mainly gas mileage and power. But another way of asking the question would be what is the A/C button for if it does not deactivate the compressor at least in some airflow mode. Thanks for the feedback
The system only cycles the compressor when necessary, it's not constantly running, its on a clutch that will engage and disengage as needed. Also, if you floor it, the compressor is shut off to maximize power.
__________________
Unlawful Gathering
Click for details!
2012 300 SRT
2011 GC Overland
2009 Modern Blue Pearl (for sale)
Headlights by DC Customs
Powered by PWR
Shifted by SHR
Tooned by Toona
Blinged by Billet Technologies
Reply With Quote
  #9  
Old 01-03-2012, 09:48 AM
Suther's Avatar
Member
My Jeep: 2012 3.6L WK2
 
Join Date: Sep 2011
Location: Kalenborn
Posts: 231
Thanks: 25
Thanked 7 Times in 7 Posts
Rep Power: 17208
Suther has a reputation beyond reputeSuther has a reputation beyond reputeSuther has a reputation beyond reputeSuther has a reputation beyond reputeSuther has a reputation beyond reputeSuther has a reputation beyond reputeSuther has a reputation beyond reputeSuther has a reputation beyond reputeSuther has a reputation beyond reputeSuther has a reputation beyond reputeSuther has a reputation beyond repute
Re: How do I turn A/C compressor off

Quote:
Originally Posted by peckmv View Post
I fail to see how ice would build up in the condenser. There should be no moisture in the system at all. The condenser has hot gasses run through it so it can condense those gases to a liquid. It is adventagous to have the compressor run occasionally during the winter months so the seals in the compressor can remain flexable and the valves can be exercised. This helps the compressor life. Oil migrating through the system is the way its designed. Oil tends to migrate towards the hot side of the system and is inherant on lubricating the compressor. If you have icing then you have a problem that should be looked into.
Thanks for the clarification, you are right; I ment the evaporator (which condenses the moisture of the air, that was my trap) that cools down the incoming air. If the compressor would run in too cold air, there would be ice buildup on the evaporator. I had the once due to a defect (my Passat).
The oil circulation in the system is also helpful for the hoses and all seals, not only for the compressor to prevent them to dry-out and get brittle.
Anyway, it is useful and prevents damage to run the A/C in wintertime, once in a while.

Concerning the A/C button, that switches the compressor of but if you use 'Defrost', 'Mix' or 'Floor' the compressor gets switched on even if the A/C button is not lit and your not int Auto mode. I think that should prevent foggy windscreens. (page 407 of the owner's manual)

Best Regards
Alex
__________________
Reply With Quote
  #10  
Old 01-03-2012, 10:37 AM
Member
My Jeep: 2012 5.7L WK2
 
Join Date: Oct 2011
Location: Avon, CT USA
Posts: 204
Thanks: 0
Thanked 5 Times in 5 Posts
Rep Power: 1595
PECo has a reputation beyond reputePECo has a reputation beyond reputePECo has a reputation beyond reputePECo has a reputation beyond reputePECo has a reputation beyond reputePECo has a reputation beyond reputePECo has a reputation beyond reputePECo has a reputation beyond repute
Re: How do I turn A/C compressor off

Pages 412 and 626 of the Jeep 2012 Grand Cherokee Owner's Manual state, in pertinent part:
Quote:
Anytime you store your vehicle, or keep it out of
service (i.e. vacation) for two weeks or more, run the
air conditioning system at idle for about five minutes
in the fresh air and high blower setting. This will
ensure adequate system lubrication to minimize the
possibility of compressor damage when the system is
started again.
So, yes, the A/C compressor must be run to maintain adequate system lubrication.

The answer to the question at hand, though, is, yes, you can turn the A/C compressor off simply by hitting the A/C button whenever it's illuminated. Although the A/C is automatically engaged with certain Mode Control selections, page 404 of the Manual states, in pertinent part:
Quote:
The A/C can be deselected manually without disturbing the mode control selection.

In addition, page 405 of the Manual states, in pertinent part:
Quote:
ECONOMY MODE
If economy mode is desired, press the A/C button to turn
OFF the indicator light and the A/C compressor. Then,
move the temperature control to the desired temperature.



__________________
2012 Jeep Grand Cherokee Overland 4x4 5.7L ORAII Mineral Gray Dark/Light Frost Beige
Reply With Quote
  #11  
Old 01-03-2012, 03:14 PM
Member
My Jeep: 2012 5.7L WK2
 
Join Date: Nov 2011
Location: perry hall, maryland
Posts: 428
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 1756
peckmv has a reputation beyond reputepeckmv has a reputation beyond reputepeckmv has a reputation beyond reputepeckmv has a reputation beyond reputepeckmv has a reputation beyond reputepeckmv has a reputation beyond reputepeckmv has a reputation beyond reputepeckmv has a reputation beyond repute
Re: How do I turn A/C compressor off

Quote:
Originally Posted by Suther View Post
Thanks for the clarification, you are right; I ment the evaporator (which condenses the moisture of the air, that was my trap) that cools down the incoming air. If the compressor would run in too cold air, there would be ice buildup on the evaporator. I had the once due to a defect (my Passat).
The oil circulation in the system is also helpful for the hoses and all seals, not only for the compressor to prevent them to dry-out and get brittle.
Anyway, it is useful and prevents damage to run the A/C in wintertime, once in a while.

Concerning the A/C button, that switches the compressor of but if you use 'Defrost', 'Mix' or 'Floor' the compressor gets switched on even if the A/C button is not lit and your not int Auto mode. I think that should prevent foggy windscreens. (page 407 of the owner's manual)

Best Regards
Alex
You are correct. The defrost engages the AC which is how the compressor gets exercised during the winter months and it also keeps the windows clear.
__________________
Reply With Quote
  #12  
Old 01-08-2012, 11:15 AM
Member
 
Join Date: Dec 2011
Posts: 24
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1119
dxrdxr is on a distinguished road
Re: How do I turn A/C compressor off

Thanks for all the feedback. I had the original question of how to switch off the compressor. Just so I am clear if you use basically any mode the A/C compressor is on and you can turn it off by turning off the A/C switch. I may have a problem with mine as the A/C switch or button does not come on when I use any mode. I always have to select it manually. But the compressor always seems to be active regardless if the A/C light is on or off. Thanks
__________________

__________________
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
Portable Air Compressor BHHJEEP Grand Cherokee - WK2 - 35 10-25-2011 10:46 AM
QL compressor #3 andyh Trouble Shooting/Problems/Service 13 07-22-2011 04:47 PM
A/C Compressor not engaging! cobrakillerta Troubleshooting/Problems Discussion 4 06-28-2011 10:14 PM
A/C Compressor not engaging! cobrakillerta Grand Cherokee - WK 6 06-24-2011 12:58 PM
A/C compressor problems dfwt70gt Grand Cherokee - WK 7 07-25-2010 10:21 PM

» Random Garages

Joey

yocubed

Jep

esierens
Add your Jeep
Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 03:23 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

JeepGarage.org is in no way associated with or endorsed by Chrysler Group LLC.