Notices
 

  

User Tag List

Thread: Air con problem, completely flummoxed

Results 1 to 3 of 3
  1. Exclamation Air con problem, completely flummoxed 
    #1
    Join Date
    May 2013
    Location
    Tewkesbury UK
    Posts
    1
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    0 Post(s)
    Hi Folks, I am really hoping someone can point me in the right direction here. I have seached so much in forums here and else where and not found the issue I am having.

    History , car sat on the drive with no use during lockdown. Batttery went flat. Recharged . THEN :
    1. After starting the fan speed didn't respond on LO and just ran slowly .
    2. Ran VCDS Autoscan, only errors related to flat battery nothing else
    3. VCDS HVAC no fault codes so in HVAC ran Basic settings as suggested by hits on web.
    4. OK now fan run as expected but NO Cold air .
    5. All flaps operate as expected
    6. ECON light works as expected (not on solid etc)



    • This is where I am stuck. VCDS shows no errors
    • I am attaching Measurement Blocks for HVAC in case someone can see any issues. From my view it appears G65 OK and Gas pressure I have seen between 6-9 bars. So I don't think it needs re-gassing (re-gassed last year).
    • Not sure how to check if the compressor is actually kicking in , but blocks seems to say its working.
    • HELP ....... PLEASE



    See Blocks below (Hope 18 are enough)


    1.jpg
    2.jpg
    3.jpg
    4.jpg
    5.jpg
    6.jpg
     
    0 0 0
     

  2. Re: Air con problem, completely flummoxed 
    #2
    Join Date
    Aug 2020
    Location
    England
    Posts
    3
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    0 Post(s)
    Sounds a bit like my (solved) issue - if you haven't already fixed, it try the later steps in Solved 2007 TDI Avant - A/c fault - compressor shear link
     
    0 0 0
     

  3. Re: Air con problem, completely flummoxed 
    #3
    Join Date
    Nov 2020
    Location
    Southport
    Posts
    3
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    0 Post(s)
    Hi Plug it in,

    Did you fix this?

    I have a similar problem and trackguy is spot on (well done you for finding it) the compressor is a vario drive type, mine is a Denso, and is controlled by a solenoid valve (N280) which is controlled via the computerma bob.

    Do you know anyone that has ac guages? If so if you hook them up and watch the high and low pressures (Red and Blue respectively) it can tell you a lot.
    With the AC off the static pressure will be the same between the two.
    Switch the AC on and the Low side should drop and the High side should rise. If this happens it means your comp is kicking in and most likely not the cause.
    Ideally you want about 30-40 psi on the low and 150-200 on the high side (this is ambient temp sensitive so will be lower during the winter...your static will read the ambient temp in degrees F)


    If the shaft is spinning with the pulley you don't have trackguy's problem and it is likely one of two issues.
    1. the solenoid control valve is faulty (even though you are showing a good set of readings from the N280 measure block)
    2. the vario swash plate mechanism in the comp is stuck/seized in the off position.

    I hope you don't mind but if anyone can help with my story of woe it would be greatly appreciated.

    Hello and thank you in advance for taking the time to read this.

    I will try and get as much detail down to give the diagnostic heroes amongst you all the info I can.

    I am working on my friends 2011 Exeo Sport Tech st. (Audi A4 B7) The AC hasn't been working for a while as it has the dreaded G65 error code/Econ light issue.
    So while locked down I offered to fix it!


    I replaced the high pressure sensor while it was jacked up on stands having new discs and pads.
    I have VCDS and the scan is now clear (apart from glow plug 3!!) and the Econ light goes out but still no air.
    The comp is a denso variable model 6seu14c, not the clutch type.
    There is voltage at the N280 control solenoid and in VCDS the measure blocks show it operating fine (amps rising and falling when econ button cycled) as is the G65 and compressor state.

    With the ac gauges connected the static pressure today was about 50-60 psi which at 14 degrees C seems about right.

    The issue is when the air con/Climate button is pressed there is absolutely no movement between the pressures of the high and low side.
    As all the VCDS and voltage checks seemed ok I am veering to the variable swash plate in the compressor or the pulley being sheered

    Today the compressor came off (after pumping down) and the n280 was tested and the solenoid operates. The pulley was removed and is fine the shaft turns smoothly with no hint of any black death or metal in the oil.

    While the comp was off the lines were blown through to check for blockages, none found all pipes seemed clear. The evaporator expansion valve was removed and cleaned/checked, all ok.

    With shaft, pulley and solenoid ok the comp was put back on, system vacuumed out pressure tested and re-gassed.

    Exactly the same, no movement whatsoever between the high and low gauges when ac turned on.

    Has anyone come across this before as i'm scratching my head now?
    Does anyone have any wiring diagrams by any chance?

    Any help/suggestions as to how I should proceed would be greatly appreciated.

    Many thanks,

    Mike.
     
    0 0 0
     

Similar Threads

  1. MMI completely broken - what to do?
    By lala in forum Audi A6 - C7 Forum - 2011- 2018
    Replies: 32
    Last Post: 10-12-2015, 07:59 PM
  2. My car is completely messed up..
    By mojotimes in forum Audi A4 - B5 Forum - 1995 - 2002
    Replies: 0
    Last Post: 26-09-2014, 06:49 PM
  3. DIS completely dead
    By stevij in forum Audi A4 - B5 Forum - 1995 - 2002
    Replies: 0
    Last Post: 09-09-2014, 03:08 PM
  4. Completely on the edge...
    By firstvolkswagon in forum Golf MK4 - 1999 - 2004
    Replies: 5
    Last Post: 18-02-2012, 11:44 AM
  5. Please Help completely random cutting out problem!! argh!
    By kendo2k in forum Golf MK2 - 1984 - 1992
    Replies: 4
    Last Post: 05-06-2009, 08:59 AM
Tags for this Thread

View Tag Cloud

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 - Scania - MAN - Ducatti - VW Audi Forum -


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