need clarification on TR climate controls | FerrariChat
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need clarification on TR climate controls

Discussion in 'Boxers/TR/M' started by johng, Apr 23, 2006.

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  1. johng

    johng Formula 3

    Oct 23, 2004
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    john g
    #1 johng, Apr 23, 2006
    hi everyone

    i'm confused over a few bits in the owners manual. it states that the fresh air ventilation button (the middle button in that column of three buttons on the center console) should always be pressed during normal driving conditions. additionally, the stop button should never be pressed during starting of the car. i would like to just drive around with the stop button pushed. i drive with the windows down most of the time so i don't need the fresh air vents to be on. so, a couple of questions:

    is it ok to push the stop button while driving?
    do i then have to push the fresh air vent button back on before shutting down the engine?

    thanks
    john
     
  2. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    #2 Steve Magnusson, Apr 23, 2006
    John,

    What is your reference for this instruction (page number)? Having the "STOP" button pressed is how it should be when you start a TR. If you have any "active" round button pressed during starting, this draws extra current to run the AC fan so that's what you shouldn't do.

    The "fresh air" button is not just a vent control -- the whole AC system (fan + compressor or heater) runs
     
  3. johng

    johng Formula 3

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    john g
    #3 johng, Apr 23, 2006
    i'm looking at my 1990 US-spec TR owners manual, pages 44-47: Airconditioning and windscreen defrosting

    there is a diagram of the AC system on pages 45-46. i realize that some kind of temp control is occuring with the fresh air vent button, which is what got me wondering why the manual states i shouldn't have it off while starting. maybe i'm reading it wrong?

    john
     
  4. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    #4 Steve Magnusson, Apr 23, 2006
    Wow, that is horribly confusing ;)

    I believe the 2 sentences located at the top of page 47 actually apply to buttons 14, 15, and 16 as a group (and not to the prior button 13 description on page 44) -- but I can totally agree, that the way it's written/structured, it seems like they are applied to button 13 (STOP). If you read it this other way, it makes more sense -- i.e., don't push button 14, 15, or 16 during starting, but I have to confess that I don't fully get that second sentence about not pushing a button if the system is delivering cold air (unless it something to do with the AC sometimes running automatically when you've got the heat on and are defrosting the windshield).

    Anyway, I'm very, very sure that you should always have the STOP button pressed when starting the engine.
     
  5. johng

    johng Formula 3

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    #5 johng, Apr 24, 2006
    hi steve

    yes, that second read makes more sense to me too. i also didn't really understand why i couldn't push a button when cold air was coming in. i have to admit, this is the most "interesting" AC system i've had in a car!

    thanks for your help
    john
     
  6. KatMan

    KatMan Formula Junior
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    #6 KatMan, Apr 25, 2006
    i too struggled over that button 13 thing. i always start my 86 tr with it pressed. i don't know wth they were trying to say. btw, pushing button 16 on my car seems to make absolutely no difference in the air flow.
     
  7. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    #7 Steve Magnusson, Apr 25, 2006
    This indicates that you have a problem somewhere in the "pushbutton switch+vacuum lines+vacuum actuators+moveable flaps" system that controls the airflow inlet and outlet directions (it's all pneumo-mechanical -- no electrics involved). Could be as simple as a vacuum line has come off its fitting, or been pinched closed, or a "dead" actuator, or a bad pushbutton switch assembly, etc..

    Not sure that I'd tear up the whole dash to fix such a problem, but checking that you've got vacuum coming into the pushbutton switch from the reservoir/engine and checking the vacuum line connections and routing at the pushbutton switch might be something things to look into without being a huge project.

    After you shut off the engine, if you alternately press button 13 (STOP) and button 15, do you hear the actuators+flaps moving around?
     
  8. eogorman

    eogorman Formula Junior

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    Eugene O'Gorman
    #8 eogorman, Apr 25, 2006
    I believe it has to do with translating error form Italian to English. I have seen many other errors in service manuals that were translated and it appears to be a common error that the english reads to do something and the Italian version is never do it. It my case I did have my TR A/C compressor lock up on starting with the stop button not depressed, I forgot. It only happened once but If I remember I start the car with the stop button depressed.
     

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