Can anyone help with a climate control problem?

Discussion in 'General Motoring' started by C R Briggs, Sep 8, 2007.

  1. C R Briggs

    C R Briggs Guest

    Hello All,

    Meriva 1.6 Enjoy EasyTronic on 53 plate with climate control..

    With AirCon off ('ECO' showing on control panel) and 'Auto' with temp
    selected below ambient (outside) temp or 'Lo', the vents blow very warm
    (above ambient) air.

    Selecting a temp above ambient or 'Hi' gives hotter air.

    'Cycling' temp control 'Hi' - 'Lo' - 'Hi' - 'Lo' several times over
    about 2 - 3 minutes sometimes gets ambient air with 'Lo' selected, but
    the next time the vehicle is used the control problem re-occurs.

    Even with AirCon 'on', and 'Lo' selected, the air from the vents does
    not get 'cold', merely cooler.

    I have no idea how the temp control works, but it is as if there is a
    valve that is not fully closing and is allowing the heater to warm the
    air when it should not. Could this be a 'sticking' valve (hot water or
    air control) or the control circuitry not sending the correct signals?

    Any help with diagnosis and rectification of the fault would be
    appreciated.
    --

    Regards,

    Roger.

     
    C R Briggs, Sep 8, 2007
    #1
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  2. When was the air con last serviced?

    Cheers

    D
     
    [email protected] home, Sep 8, 2007
    #2
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  3. C R Briggs

    Lenny Guest

    Hi Roger,

    Probably not much help but I once had a very similar problem with a Fiesta's
    air-con. Required fluid top-up/change. Check that when air-con compressor is
    running that the coolant pipes are getting very cold i.e. condensation
    freezing on them.

    Lenny
     
    Lenny, Sep 9, 2007
    #3
  4. C R Briggs

    C R Briggs Guest

    Hi,

    Car has been Main Dealer serviced as required by Handbook & servicing
    indicator, i.e. at 2 years old in 2006 - mileage is low, so servicing is
    by time interval - & next service is due Feb 2008. Air-con has not been
    serviced otherwise.

    I'm not sure that it's an Air-con problem though, because the problem is
    evident when the Air-con is switched off. The problem is that the
    heater does not seem to "switch off" and blows hot air with "Lo"
    selected.

    Any further help would be appreciated.
    --

    Regards,

    Roger.

     
    C R Briggs, Sep 12, 2007
    #4
  5. I am pretty sure Air con servicing is a customer request add on, not part of
    the standard scedule.

    Lack of use is the main problem with Air Con.

    Being Climate control, rather than straight Air Con, it needs the air con
    working properly to function.

    I'd get the air con checked first.

    Cheers

    D
     
    [email protected] home, Sep 12, 2007
    #5
  6. C R Briggs

    airsmoothed Guest

    Is the aircon compressor actually kicking in? If you set the
    temperature to LO then switch the CC off ( I'm assuming it has an off
    button like my Vectra's CC ) and then switch back to AUTO do the
    engine revs increase a bit? They should do, to acount for the extra
    load of the aircon compressor. If they don't then it sounds like the
    aircon is low on gas and so isn't kicking in when it should.
     
    airsmoothed, Sep 13, 2007
    #6
  7. C R Briggs

    C R Briggs Guest

    Hi,

    Thanks, it looks like a Dealer job then - but, funnily enough, it has
    behaved perfectly today !
    --

    Regards,

    Roger.

     
    C R Briggs, Sep 13, 2007
    #7
  8. C R Briggs

    me140 Guest

    I wonder if there is a problem with the mixed air servo motor? Put your
    head under the dash and see if you can hear the motor moving as you change
    the temp.
    It could also be a temp sensor fault giving the ecu incorrect info so it
    doesn't drop the temp down.
    Your local dealer will be able to put it on tech 2 and read any fault codes
    and check the live data.
     
    me140, Sep 13, 2007
    #8
  9. C R Briggs

    C R Briggs Guest

    Hi,

    Yes, the Air-con seems to be working. The engine 'labours' a little
    when it is switched on, and revs rise a little when switched off; and
    water is delivered to the ground after a short while with the Air-con
    switched on. As I said, with the Air-con 'off' ('ECO' displayed) the
    car seems to heat the incoming ambient air with the temp selector set at
    'Lo' in both 'Auto' and 'Manual'.

    But, funnily enough, it has behaved perfectly today !
    --

    Regards,

    Roger.

     
    C R Briggs, Sep 13, 2007
    #9
  10. C R Briggs

    airsmoothed Guest

    Maybe one final thing to try, the CC should have a way of resetting
    the servos, usually involves holding a couple of the control buttons
    in then turning the ignition on. Might be worth a go, I would think
    the Meriva has a similar feature.
     
    airsmoothed, Sep 14, 2007
    #10
  11. C R Briggs

    C R Briggs Guest

    Thanks,

    I've checked the mixed air servo motor by doing as you say (listening)
    and it seems to be running OK.

    The system seems to be working fine and well at the moment.

    Thanks again,
    --

    Regards,

    Roger.

     
    C R Briggs, Sep 20, 2007
    #11
  12. C R Briggs

    C R Briggs Guest

    Hi,

    I can't see any info in the handbook about re-setting; and I've had a
    search of forums for such information, but not found any - but that
    doesn't mean anything really. :) If anyone is able to add anything
    then it would be appreciated.

    The system seems to be working fine and well at the moment.
    --

    Regards,

    Roger.

     
    C R Briggs, Sep 20, 2007
    #12
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