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  1. #1
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    HELP WITH A/C & COOLING FAN PROBLEMS

    Hi guys,

    This is my first post here and I am hoping this is the forum to solve my problems.

    I have spent what seems like ages looking at threads, Google etc.

    Story goes like this;

    Ive had the car 2 years and had an issue with squeeling from alternator belt, until one day the alternator pulley seized up and sheered off (last year). I replaced this and thought nothing more. Around the same time as the squeeling and seizing up, my ECON light kept coming on and A/C was intermittent. Eventually the A/C got warmer and I left it, ignorantly thinking I would get a re-gas when I could afford it. I also now remember that at the time the radiator fan seemed noisier and excessively fast. I have never had it regassed and it still blows warm air.
    It wasnt until a couple of weeks ago, I had my cambelt changed and had my car scanned for error codes. I had these codes;

    18359- Radiator Fan 2 (V177): Movement Restricted / Jammed
    P1951 - 000 - - - Intermittent
    Freeze Frame:
    RPM: 1638 /min
    Torque: 144.0 Nm
    Speed: 41.0 km/h
    Load: 32.2 %
    Voltage: 14.21 V
    Bin. Bits: 11000000
    Temperature: 54.0°C
    Duty Cycle: 15.5 %

    18358 - Radiator Fan (V7): Movement Restricted / Jammed
    P1950 - 000 - - - Intermittent
    Freeze Frame:
    RPM: 777 /min
    Torque: 0.0 Nm
    Speed: 0.0 km/h
    Load: 0.0 %
    Voltage: 13.76 V
    Bin. Bits: 11000100
    Temperature: 62.1°C
    Duty Cycle: 9.6 %


    I was told that the fans were knackered and to replace them.

    Neither fan appeared to be working but there was no obstruction and they spun fairly freely by hand.

    I have since then found my smaller fan (left hand side of the engine bay) running fast , while the ECON light was off and the car sitting on a hot day at 90*. I pressed the ECON button as if to turn off A/C and a few seconds later the fan switched off. I have not been able to repeat this since (running it up to temp etc).

    I purchased a 2nd hand pair of fans from an ebay scrappy and was assured they were tested and worked. I have fitted them but they dont kick in at any time either (having had the car at running temp.)

    I have seen a thread about the compressor and that the centre of the pulley should run free. Mine doesnt and I wonder if the seizing alternator pulley (connected to compressor by the belt) has caused damage to compressor??

    I have seen lots of threads on this fan topic and they suggest testing certain things but I am a little thick when it comes to electrics. I have checked the fuses in the engine bay and all appear fine.

    Firstly does this sound like something you may have had an issue with or that you can offer advice on??

    Secondly can anyone assist with the following

    Where is the thermoswitch located?
    Is it correct that the Fan Control Module is built into the big fan?
    How do I test the relays?

    Any help on these apparently linked issues will be very much appreciated.
    DAN

    OWDEE A3
    AUDI A3 2.0TDI SPORT 2004
    VW PASSAT 2.0TDI SPORT ESTATE 2006

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  3. #2
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    Bump.....
    Ideas anyone?
    DAN

    OWDEE A3
    AUDI A3 2.0TDI SPORT 2004
    VW PASSAT 2.0TDI SPORT ESTATE 2006

  4. #3
    audicruiser's Avatar
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    It could be the compressor like you say, but more than likely it is the fan control module. Plus you aren't actually sure the fans work as you bought them from E-bay....
    Scott

    Audi A3 Sportback 2.0T Quattro S-Line 2007 8P2
    Lava Grey, Exclusive Line Black/Silver Leather, Heated Seats, Bose, RNS-e, iPod, Auto Lights & Wipers, Interior Light Pack

  5. #4
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    Audi=No fault code, no idea

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    Aircon systems are the Devils work so most of us here will not be able to offer more than you have already tried.
    The only thing i would add is the 2nd fault code could date back to when the belt came off and just be reporting that moment in time..
    My advice would be to send a personal message PM to Staz who is into this sort of witchcraft and magic

    View Profile: Staz - Audi-Sport.net
    ask him to just have a look at this thread and see if he has any thoughts. Copy and send this page address from the top of the page ie: www.Audi-sport etc
    Ibis white Revo S3 and now matching Vivaro LWB HR 2900 :-)

    Many people are alive because its illegal to shoot them.

  6. #5
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    Thanks Scott, I know I ran the risk with those fans. Where is the Fan control module??
    DAN

    OWDEE A3
    AUDI A3 2.0TDI SPORT 2004
    VW PASSAT 2.0TDI SPORT ESTATE 2006

  7. #6
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    Cheers Paddy,
    I'll give it a go and see what he says!
    DAN

    OWDEE A3
    AUDI A3 2.0TDI SPORT 2004
    VW PASSAT 2.0TDI SPORT ESTATE 2006

  8. #7
    paddy's Avatar
    Audi=No fault code, no idea

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    He also has a thread here

    Air Conditioning
    Ibis white Revo S3 and now matching Vivaro LWB HR 2900 :-)

    Many people are alive because its illegal to shoot them.

  9. #8
    audicruiser's Avatar
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    Quote Originally Posted by OWDEE A3 View Post
    Thanks Scott, I know I ran the risk with those fans. Where is the Fan control module??
    I think it's within the fan assembly...
    Scott

    Audi A3 Sportback 2.0T Quattro S-Line 2007 8P2
    Lava Grey, Exclusive Line Black/Silver Leather, Heated Seats, Bose, RNS-e, iPod, Auto Lights & Wipers, Interior Light Pack

  10. #9
    Staz's Avatar
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    Wow, lots going on here!

    Do the fans run when the engine has warmed up and the car is stationary? At all??

    The compressor itself can turn "freely" but you can't do this by hand as the compressor clutch covers your access. The pulley and clutch are one unit that attach to the front of the compressor.
    8P2 S3

    For advice on Air Con problems please read my FAQs.
    To find ASN members with VCDS check out the MAP.

  11. #10
    paddy's Avatar
    Audi=No fault code, no idea

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    Sorry to sort of dump this one on you Staz
    Ibis white Revo S3 and now matching Vivaro LWB HR 2900 :-)

    Many people are alive because its illegal to shoot them.

  12. #11
    Staz's Avatar
    is a retronaut

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    no worries mate, it's about time I spent a bit of time on here!
    8P2 S3

    For advice on Air Con problems please read my FAQs.
    To find ASN members with VCDS check out the MAP.

 

 

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