355 rh fan not working | FerrariChat

355 rh fan not working

Discussion in '348/355' started by gee355, Mar 15, 2007.

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  1. gee355

    gee355 Karting

    Apr 3, 2005
    64
    enfield
    Full Name:
    George K
    does any one know what triggers the rh fan relay,
     
  2. eric355

    eric355 Formula 3
    Silver Subscribed

    Nov 30, 2005
    1,225
    Toulouse (France)
    Full Name:
    Eric DECOUX
    #2 eric355, Mar 15, 2007
    Last edited by a moderator: Sep 7, 2017
  3. PAP 348

    PAP 348 Ten Time F1 World Champ
    Lifetime Rossa Owner

    Dec 10, 2005
    100,220
    Mount Isa, Australia
    Full Name:
    Pap
    #3 PAP 348, Mar 15, 2007
    Last edited by a moderator: Sep 7, 2017
    ;)
    Image Unavailable, Please Login
     
  4. Nicksta

    Nicksta Formula Junior

    Sep 16, 2006
    535
    DC Ranch & NY, NY
    Full Name:
    Nick Ingle
    I thought the right fan was sort of a back-up. Mine left fan comes on almost as soon as I start the car - and sounds like a Hoover vacuum cleaner. The temp stays put in the happy center, but is this normal?
     
  5. xavior

    xavior Formula 3

    Aug 22, 2006
    1,793
    Full Name:
    .
    I just had this problem with my left hand fan. The sensor is broken. The go out allot.
     
  6. eric355

    eric355 Formula 3
    Silver Subscribed

    Nov 30, 2005
    1,225
    Toulouse (France)
    Full Name:
    Eric DECOUX
    Fan operations have already been discussed (try a search) but as a summary:

    - the LH fan is triggered by a thermoswitch located on the LH radiator AND by the A/C system according to the pressure.

    - the RH fan is triggered by the Motronic according to the coolant temperature measured by the NTC sensor located in the center of the V (coolant at the output of heads).

    In your case, try to switch off the A/C. If the LH fan runs as soon as you start the car, you probably have a thermoswitch stuck in the closed position.
     
  7. Nicksta

    Nicksta Formula Junior

    Sep 16, 2006
    535
    DC Ranch & NY, NY
    Full Name:
    Nick Ingle
    I think it was the AC - I just figured that one out last night. Thanks for the info.
     
  8. gee355

    gee355 Karting

    Apr 3, 2005
    64
    enfield
    Full Name:
    George K
    thanks mate spot on
     
  9. delaney

    delaney Formula Junior

    Nov 8, 2003
    720
    Montgomery TX
    Full Name:
    PETER DELANEY
    Before you go for sensors etc check the fuses..2 fuses ..1 for each fan.

    The fuses DO go out a lot.


    Pete
     
  10. f355spider

    f355spider F1 World Champ
    Owner Rossa Subscribed

    May 29, 2001
    18,044
    USA
    Agreed. I don't know about "a lot", but I had the left had one go out once. Replaced it a year ago, no further problems. Someone said if you drive in the rain (common here in Seattle) the resistance of all that water at freeway speeds (through the fan blade/motor) can cause a lot of current draw on the circuit, causing the fuse to blow. I even saw a friends 355 that had 40 amp fuses (stock is 30 amp) in the fuse panel installed sometime prior to his purchase....obviously someone got tired of replacing fuses!

    I think I would be inclined to purchase 30 amp circuit breakers from AutoZone if they blew that often. They are only $4.99 and automatically reset, so you don't have to dig around in there each time to check/replace.

    Similar to these:
    http://www.wiringproducts.com/dept_28.html

    But the ones at Autozone did not look as tall, and the added height of the ones pictured in this link might be a problem.
     

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