Help needed: AC fan only running on high | FerrariChat
Buy

Help needed: AC fan only running on high

Discussion in 'Mondial' started by americanpaki, May 21, 2014.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, Skimlinks, and others.

  1. americanpaki

    americanpaki Rookie

    May 21, 2014
    2
    #1 americanpaki, May 21, 2014
    I have a 1989 t and my AC fan only runs on high. If I turn the fan dial to the middle, it does not run. But if I press the A/E button then it runs on slow as well as high. When AC button is pressed the fan comes on only when I turn the dial to max (high). Any ideas as to what could be causing this?

    I tried to run a search but did not find anything specific to this topic. Maybe didn't run the search properly but if anyone can tell me what could be the cause or point me to a thread that has this top I would greatly appreciate it.
     
  2. bartzagato

    bartzagato Formula Junior

    Aug 7, 2010
    614
    Belgium
    Full Name:
    Bart
    #2 bartzagato, May 22, 2014
    Last edited by a moderator: Sep 7, 2017
    Hi

    If only 2 things work: off or full speed: regulators are broken. I don't know how the Mondial T is in this department, perhaps it has a potentiometer in the fanspeedknob as the QV: n°7.
    Image Unavailable, Please Login
     
  3. raf456

    raf456 Karting

    Jan 27, 2013
    178
    Chapel Hill, NC
    Full Name:
    Robert Freiburghouse
    #3 raf456, May 22, 2014
    I had the exact same problem. My mechanic replaced a transistor somewhere in the system because the fan speed unit #8 in the diagram was not available. I will ask him exactly what type of transistor and where he put it.
     
  4. americanpaki

    americanpaki Rookie

    May 21, 2014
    2
    #4 americanpaki, May 22, 2014
    So the question is that if the transistor is bad will it still work with A/E but not with AC button? Did you have the same problem where it was working fine when A/E was pressed but not when AC was pressed?
     
  5. raf456

    raf456 Karting

    Jan 27, 2013
    178
    Chapel Hill, NC
    Full Name:
    Robert Freiburghouse
    #5 raf456, May 23, 2014
    I don't recall if the failure was only when AC was pressed - I think that it failed with either.
     
  6. Mondial 1985

    Mondial 1985 Formula Junior

    Jun 13, 2012
    344
    Greenville, SC
    Full Name:
    Mark Alan Day
    #6 Mondial 1985, May 28, 2014
    You mean yours runs?
     
  7. Rapalyea

    Rapalyea Formula 3

    Jun 18, 2013
    1,511
    Georgia Mountains US
    Full Name:
    David Rapalyea alias
    #7 Rapalyea, May 28, 2014
    Mine is intermittent. I do not have A/C but love the strong fan. Except when it does not run at all. This morning it ran fine until I stopped to shop. Then did not run again for the rest of the day.

    Its not all that big a deal where I live. Today is hot at about 90F but always low humidity. Both windows down and the sunroof opened about six inches and the general air flow is very good. But when stopped [which is rare enough] I do miss the vent fan.
     
  8. Daniel789cars

    Daniel789cars Rookie

    Sep 13, 2005
    11
    Las Vegas
    Full Name:
    Dan
    #8 Daniel789cars, Nov 9, 2021
    I know I am late to reply, but did you ever find out what your mechanic did, as my car is having same issue.
     
  9. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    26,861
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    #9 Steve Magnusson, Nov 9, 2021
    What model/year/version F? If a TR, as in your Profile, do a search in the TR section using "power transistor" for many prior threads. The stock TR location is riveted inside the center air outlet vent (the idea being to use the air coming out of the center vent area to cool the transistor), but sometimes people move it to another location.
     
  10. Sigmacars

    Sigmacars Formula 3
    Silver Subscribed

    Jul 19, 2006
    1,220
    #10 Sigmacars, Nov 15, 2021
    Image Unavailable, Please Login
    This is the Transistor you need on e bay $5.00 it regulates the fan speed
     

Share This Page