456M - heater doesn't heat up unless A/C is on..? Please can anyone help | FerrariChat
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456M - heater doesn't heat up unless A/C is on..? Please can anyone help

Discussion in 'Technical Q&A' started by 187mph, Dec 10, 2008.

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  1. 187mph

    187mph Rookie

    Oct 2, 2007
    2
    Hertfordshire
    Full Name:
    Rob
    #1 187mph, Dec 10, 2008
    Great site - thanks to all who run and participate. Many hours spent cruising...but now I need your help :

    I love my 2000 456GTM for its quirks - but driving at the moment means I have to wear gloves, hat and fur coat to keep warm (Its 2 degrees in the UK at the moment). I have discovered that if I turn on the Air Con I can get heat - any idea what may be wrong ?

    People used to hear and then look at the car - now they look at me instead in my winter gear and think I am barking mad.

    Any suggestions from the team before I get stitched up at the dealers - this is not one I have found on unsual defects list for 456 owners.

    Thanks.
     
  2. Fast_ian

    Fast_ian Two Time F1 World Champ

    Sep 25, 2006
    23,397
    Campbell, CA
    Full Name:
    Ian Anderson
    #2 Fast_ian, Dec 10, 2008
    Nothing! - that's the way it is! - "A/C on" should probably be labelled as "A/C or heat on"......

    Cheers,
    Ian
     
  3. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    39,310
    Clarksville, Tennessee
    Full Name:
    Terry H Phillips
    #3 tazandjan, Dec 10, 2008
    Last edited by a moderator: Sep 7, 2017
    Rob- I think what Ian was trying to say was there is no separate switch to turn off the air conditioning compressor on your 456M (my 575M does have one) like on most modern cars. Your switch shuts off the entire HVAC system, like most early HVAC panels.

    Someone chime in if I got this wrong. Ricambi's excellent replacement panel for sticky problems.

    Taz
    Terry Phillips
    Image Unavailable, Please Login
     
  4. kosmo

    kosmo Formula 3

    Oct 19, 2008
    1,569
    BIg D
    #4 kosmo, Dec 10, 2008
    yes, this is my experience too, but I wonder why heat from the engine compartment doesnt come in...
     
  5. DMOORE

    DMOORE Formula 3

    Aug 23, 2005
    1,720
    San Diego
    Full Name:
    Darrell
    #5 DMOORE, Dec 10, 2008
    It closes the ducts.




    Darrell.
     
  6. 187mph

    187mph Rookie

    Oct 2, 2007
    2
    Hertfordshire
    Full Name:
    Rob
    #6 187mph, Dec 11, 2008
    Thanks for the advice.
    Unusually - this will not cost me.
    Another quirk to be noted.
    Rob
     

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