Notices
 

  

User Tag List

Thread: Aircon problems

Page 1 of 2 12 LastLast
Results 1 to 10 of 11
  1. Aircon problems 
    #1
    Join Date
    Oct 2007
    Posts
    1,423
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    5 Post(s)
    I am having problems with my aircon, it works well when on tickover but does not cool when revs climb over 1200. I have checked with VCDS, the solenoid valve duty cycle stays at 60% and the current at 0.6 A but the discharge pressure drops from 15 Bar to 5 Bar, the compressor status stays at on, no fault codes are logged. At first I thought it was the safety clutch slipping at higher revs but if I put a spanner on the centre nut I can turn the pulley so I think the clutch is fine. I am convinced it is a faulty solenoid valve not controlling the swash plate angle when the revs increase, has anyone had these symptions with a faulty solenoid?
     
    0 0 0
     

  2. Re: Aircon problems 
    #2
    Join Date
    Sep 2008
    Location
    chester
    Posts
    1,651
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    17 Post(s)
    I would get some gauges on the hi/low sides and see the actual pressure,could be short of gas.
    A4 B6,A4B7Quattro,MK4 Golf,MK5Golf gone and well forgotten,MK6Golf.
     
    0 0 0
     

  3. Re: Aircon problems 
    #3
    Join Date
    Jan 2007
    Location
    Nottingham, England
    Posts
    35,498
    Post Thanks / Like
    Blog Entries
    2
    Mentioned
    28 Post(s)
    Tagged
    1 Thread(s)
    Quoted
    690 Post(s)
    Have we! The number of these modern variable displacement compressors we change is ridiculous, the MQB platform is particularly prone.
    "I disapprove of what you say, but I will defend to the death your right to say it"

    Evelyn Beatrice Hall (1868-1956)
     
    0 0 0
     

  4. Re: Aircon problems 
    #4
    Join Date
    Oct 2007
    Posts
    1,423
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    5 Post(s)
    Quote Originally Posted by nevo View Post
    I would get some gauges on the hi/low sides and see the actual pressure,could be short of gas.
    VCDS give pressure readings, these are fine untill the revs climb.
     
    0 0 0
     

  5. Re: Aircon problems 
    #5
    Join Date
    Sep 2008
    Location
    chester
    Posts
    1,651
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    17 Post(s)
    I would say if the discharge press drops to 5 bar there's a insufficient gas on the suction anyway if you decide to change the solenoid valve you'l have to evac the system so you can check what the actual pressures are.
    A4 B6,A4B7Quattro,MK4 Golf,MK5Golf gone and well forgotten,MK6Golf.
     
    0 0 0
     

  6. Re: Aircon problems 
    #6
    Join Date
    Oct 2007
    Posts
    1,423
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    5 Post(s)
    Quote Originally Posted by nevo View Post
    I would say if the discharge press drops to 5 bar there's a insufficient gas on the suction anyway if you decide to change the solenoid valve you'l have to evac the system so you can check what the actual pressures are.
    My first thought, I had the gas topped up 3 weeks ago, it made no difference. I think the extra force on the swash plate due to the revs increasing is sufficient to overcome the faulty valve and square up the swash plate on the shaft thus producing zero discharge, I will get back and report what I find.
     
    0 0 0
     

  7. Re: Aircon problems 
    #7
    Join Date
    Jan 2007
    Location
    Nottingham, England
    Posts
    35,498
    Post Thanks / Like
    Blog Entries
    2
    Mentioned
    28 Post(s)
    Tagged
    1 Thread(s)
    Quoted
    690 Post(s)
    I saw that on a T5 a few weeks ago, it was the compressor.
    "I disapprove of what you say, but I will defend to the death your right to say it"

    Evelyn Beatrice Hall (1868-1956)
     
    0 0 0
     

  8. Re: Aircon problems 
    #8
    Join Date
    Oct 2007
    Posts
    1,423
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    5 Post(s)
    Hi Crash, I hope you don't mean that you changed the control valve and it still did not work! or do you mean that you just changed the compressor to make sure it did not come back in?
     
    0 0 0
     

  9. Re: Aircon problems 
    #9
    Join Date
    Jan 2007
    Location
    Nottingham, England
    Posts
    35,498
    Post Thanks / Like
    Blog Entries
    2
    Mentioned
    28 Post(s)
    Tagged
    1 Thread(s)
    Quoted
    690 Post(s)
    I never change the valve, it is not a VAG approved way of dealing with the problem.
    "I disapprove of what you say, but I will defend to the death your right to say it"

    Evelyn Beatrice Hall (1868-1956)
     
    0 0 0
     

  10. Re: Aircon problems 
    #10
    Join Date
    Oct 2007
    Posts
    1,423
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    5 Post(s)
    Thats nice to know, I still have hope with the valve change.
     
    0 0 0
     

Page 1 of 2 12 LastLast

Similar Threads

  1. Important Aircon Problems
    By Evobully in forum Golf MK4 - 1999 - 2004
    Replies: 4
    Last Post: 02-06-2017, 12:04 PM
  2. A4 2003 aircon problems
    By besi_05 in forum Audi A4 - B6 Forum - 2002 - 2005
    Replies: 2
    Last Post: 12-06-2014, 12:08 PM
  3. Please Help Aircon Problems!!!
    By gumballforever in forum Passat - B6 Forum - 2005 - 2010
    Replies: 1
    Last Post: 10-08-2012, 07:33 PM
  4. Aircon problems, please help lol
    By iparkes in forum Golf MK4 - 1999 - 2004
    Replies: 1
    Last Post: 26-06-2011, 06:02 PM
  5. Aircon/blower problems
    By smudge1101 in forum Audi A4 - B5 Forum - 1995 - 2002
    Replies: 11
    Last Post: 07-10-2010, 07:28 AM
Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  




  


Disclaimer: VW Audi Forum is an "independant enthusiast website", administered in line with guidelines supplied by VAG in the UK, and is in no way related to any of the Worldwide Volkswagen,Audi,Seat,Skoda,Bentley,Bugatti,Porsche or Lamborghini group of Companies. For official up to date information on any of there vehicles, please visit the official websites. Any comments made throughout this website, are the views of the respective poster, and in no way represent the views of the VW Audi Forum Administration, or the worldwide Volkswagen & Audi Group of companies.


VW Audi Forum do not vet and are not responsible for any information which is posted in this forum. All content is viewed and used by you at your own risk and we do not warrant the accuracy or reliability of any of the information.


Copyright: Certain "words", "phrases" and "Images" used on this website by the Administration are "Copyright" of Volkswagen GB, Volkswagen AG (Germany), Audi GB, Audi AG (Germany), Volkswagen Motorsport GB, Volkswagen Motorsport AG (Germany), Audi Motorsport AG (Germany), Volkswagen Racing GB, Bentley, Bugatti, Porsche and Lamborghini. No image can be replicated by anyone WITHOUT the relevant Companies written permission.


All trademarks and copyrights remain property of their respective owners.

No part of the VW Audi Forum website or forum may be reproduced without written permission from the site administration


PLEASE NOTE - PERSONAL ABUSE, ABUSE AGAINST THIS OR ANY OTHER WEBSITE OR ANY COMPANY WILL NOT BE TOLERATED. OFFENDERS WILL BE MODERATED OR EVEN BANNED.


This website and forum are best viewed at a minimum resolution of 1024 by 768.



  



- VW AUDI Forum - The #1 Volkswagen (VW) Group Forum - Volkswagen (VW) - Audi - Seat - Skoda - Bentley - Bugatti - Lamborghini - Porsche - VW Audi Forum -


- www.vwaudiforum.co.uk - www.vwaudiforum.co.uk -