355 AC not cold | FerrariChat

355 AC not cold

Discussion in '348/355' started by mikster, Aug 24, 2014.

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  1. mikster

    mikster Formula Junior

    Nov 11, 2003
    357
    LA
    Full Name:
    SLOMO
    1… Just charged the System to a little over 2 LBS
    2… I can hear the Compressor engage when the dial is turned to cold
    3… Ths STOP button is out
    4… The Main AC fuse appears to be good

    Are there any other FUSES/RELAYS either in the Passenger Footwell or behind the Driver’s Seat that I might be missing ??? Any feedback/guidance would help me greatly, thanks…
     
  2. F355steve

    F355steve Formula 3

    Apr 9, 2008
    2,089
    Honolulu - Seattle - Okinawa
    Full Name:
    Steve
    Most likely your heater/ac diverter is broken. This is under the cover in the front trunk. It switches from allowing air through the heater core or AC unit. It may be stuck/broke on the heater core side.
     
  3. pnicholasen

    pnicholasen Formula 3

    Jan 14, 2011
    1,364
    South of Philly
    Full Name:
    Paul Nicholasen
    Make sure the condenser "radiator" is clean: no leaves or trash blocking airflow over the fins. Do the refrigerant pipes get cold to the touch when system operating? I
     
  4. F355Bob

    F355Bob Formula 3

    I haD a similar problem. I took a vise grip and pinched off the hot water hose running to the water valve and got instant cold air. One way of checking to see if that valve is bad.
     
  5. mikster

    mikster Formula Junior

    Nov 11, 2003
    357
    LA
    Full Name:
    SLOMO
    1… Just charged the System to a little over 2 LBS
    2… I can hear the Compressor engage when the dial is turned to cold
    3… Ths STOP button is out
    4… The Main AC fuse appears to be good
    5... I have new Radiators, and we cleaned the Condenser
    6... The Line is COLD

    Is this diverter an actual Mechanical part that's easy to replace, any Pics to show were its at would be nice
     
  6. F355Bob

    F355Bob Formula 3

    I m talking about the valve that has hoses from the water pump. It allows hot water to mix to regulate temps. Mine was stuck open allowing hot air to enter so the ac would blow hot air. When I pinched off the hose, got instant cold air. Easy way to check if valve is bad. I just leave the hose blocked off so always have cold air.
     
  7. pnicholasen

    pnicholasen Formula 3

    Jan 14, 2011
    1,364
    South of Philly
    Full Name:
    Paul Nicholasen
    #7 pnicholasen, Aug 24, 2014
    Last edited by a moderator: Sep 7, 2017
  8. mikster

    mikster Formula Junior

    Nov 11, 2003
    357
    LA
    Full Name:
    SLOMO
    Sir...

    Thanks again for the Pics and schematic, I will remove it this weekend and post the results.
     
  9. secondsole

    secondsole Formula Junior

    Feb 28, 2013
    267
    O-H!
    Full Name:
    Michael
    Get a Spider! Lolz..jk
     

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