A/C problem | FerrariChat

A/C problem

Discussion in '348/355' started by F355Bob, May 7, 2010.

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  1. F355Bob

    F355Bob Formula 3

    Nov 4, 2003
    1,999
    Madison, Wisconsin
    #1 F355Bob, May 7, 2010
    I have a 95 355 and I am having a problem with the A/C.---a/c works and blows cold air only out of the defroster vents. I replaced the ecu with a used one that worked before the car was taken apart and it still does same thing. I can't feel the diverter motor making any sound or movement feeling when I turn the switch to different diverter setttings. Is the diverter motor bad or is there a fuse that controlls this motor? The fuse under the footwell is fine, is there another fuse for this system?
     
  2. healeyguy59

    healeyguy59 Rookie

    Mar 22, 2010
    2
    Millersville, PA
    Full Name:
    Jerry Paulson
    #2 healeyguy59, Jul 26, 2010
    Hi "F355 Bob,

    Did you solve this? If so what was it?

    I have the same problem


    My AC system works in the "defrost" mode only. Whether set to automatic or manual, I can only get either cool or warm air to blow out of the defroster nozzles.

    I have tried everything, but the only result is air blowing out of the defrosters, (maybe a little directed to your feet) but I can't get air blowing out of the AC vents to your face. My wife refuses to consider going with me to a Rally planned for early August 2010.

    Is this an easy fix, or do I need to rip out the dashboard and perform major surgery?

    HELP!


    Please help me
     
  3. plugzit

    plugzit F1 Veteran
    Silver Subscribed

    Dec 1, 2004
    7,673
    Redondo Beach, CA
    Full Name:
    Bruce Bogart
    #3 plugzit, Jul 26, 2010
    Check the big flapper in the box in the trunk. The shaft off the motor that drives it is bad about breaking. I think Ricambi has a better part to replace it. Easy fix hope that's it!
     
  4. Ricambi America

    Ricambi America F1 World Champ
    Sponsor Owner

    Dec 7, 2003
    16,250
    Winston Salem, NC
    #4 Ricambi America, Jul 26, 2010
  5. F355Bob

    F355Bob Formula 3

    Nov 4, 2003
    1,999
    Madison, Wisconsin
    #5 F355Bob, Jul 26, 2010
    This happened to me a few years ago and it was the ECU--$1600. There is a motor for the flapper but I think it is under the dash not the trunk. I need to check that out and see if it is the problem. The flapper in the trunk I believe controls the flapper for recirclulation of outside air.
     
  6. matkat

    matkat Formula 3

    Mar 18, 2003
    1,840
    Scotland
    Full Name:
    Dave McGuire
    #6 matkat, Jul 26, 2010
    Bob, please check this out on the search function covered many times and is likely to be the motor that moves the ball valve.For US cars on drivers side in the boot/trunk do not buy the ferrari part as its way to expensive there is a saab alternate part please either PM me or post for the P/N.
    Dave
     
  7. healeyguy59

    healeyguy59 Rookie

    Mar 22, 2010
    2
    Millersville, PA
    Full Name:
    Jerry Paulson
    #7 healeyguy59, Jul 26, 2010
    Hi Matkat

    Please advise P/N for Saab alternate, also Ricambi exploded view referance

    Thanks
     
  8. Brigadelok

    Brigadelok Karting

    Jul 31, 2009
    87
    San Anselmo, CA
    Full Name:
    Jonathan
    #8 Brigadelok, Jul 26, 2010
    I have the same problem with my 98. I pulled the flapper motor off as a temporary fix as it allows the flap to rotate so I can get cold air our of the vents, but I also noticed that the heater control only works with the A/C and will not deliver warm air, so I'm thinking that it may be the ECU.
     
  9. matkat

    matkat Formula 3

    Mar 18, 2003
    1,840
    Scotland
    Full Name:
    Dave McGuire
    #9 matkat, Jul 27, 2010
  10. 348Tony

    348Tony Formula Junior
    BANNED

    Jun 8, 2010
    537
    Dallas
    Full Name:
    Tony
    #10 348Tony, Jul 27, 2010
    Last edited: Jul 27, 2010
    Your right about the flapper in the trunk...It is only for recirculating outside air. Mine didn't have the flap so my AC wouldn't work to it's highest potential till I got it repaired. But I have the same problem to an extent because I do have some air leaking out the defrost myself...not to the extreme of what I'm reading here, but enough that with the top up, I will sometimes develop a little frost on the windshield. ...that's pretty par for the course on any car with age and not just a Ferrari problem. The air ducts just get old...
     
  11. vegas1

    vegas1 F1 Rookie

    Jul 28, 2004
    4,202
    Australia
    #11 vegas1, Jul 27, 2010
    Was that the price of the ECU or did that price include instalation, et al. And I suppose the prices have risen since you did your unit.
     
  12. F355Bob

    F355Bob Formula 3

    Nov 4, 2003
    1,999
    Madison, Wisconsin
    #12 F355Bob, Jul 28, 2010
    That was the price of the ECU. I installed it myself-- takes 15 minutes
     
  13. Longhornlarry

    Longhornlarry Rookie

    Jan 2, 2015
    19
    #13 Longhornlarry, May 19, 2017
    Did you ever diagnose your problem? What was the fix. We put an ECU from another F355 car that was working last time the car was driven about a year ago, same results air blowing out to defroster vents. We also replaced the shaft on the diverter motor same results. We finally did what you did, disconnected the diverter motor and manually aligned the ducts to blow to the driver face and footwell. We checked the diverter and it turns the ducts. Something in the car auto aligns the diverter ducts to blow only out of the defroster vents. Also checked the heat on temp control and with that setting blows hot air. I am good to leave it as we now have it but can't figure out what it is that makes the diverter go into a default setting to blow only out of defroster vents!@##$%

    longhornlarry
     

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