W211 Climate Control - constantly blowing cold

Discussion in 'Electronics' started by bigjim, Jul 30, 2011.

  1. bigjim

    bigjim Hardcore MB Enthusiast

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    Hi

    Any suggestions as to why the climate control in my E55 is permanently chucking out cold air even when I select Hi on the control?

    Thanks in advance

    Jim :thumb:
     
  2. shorty

    shorty Hardcore MB Enthusiast

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    It is probably the heater exchange shut-of motor . The will be 2 of these if the car has four zone heaters , and 2 if the car has standard heaters .
    There located in the engine bay behind the SBC pump , and veryhard to access . The part is not expensive , though labour cost is high as theres a lot of stripping to access and change it
     
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  3. OP
    OP
    bigjim

    bigjim Hardcore MB Enthusiast

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    Thanks.

    Is there anyway of telling for definite?
     
  4. Benzowner

    Benzowner Hardcore MB Enthusiast

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    Just a thought, with current temperatures being high ish, would only the aircon be working as the temperature inside the car could be higher than any setting on the climate control. May be worth trying at night.
     
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  5. shorty

    shorty Hardcore MB Enthusiast

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    Getting a scan done on STAR should tell if this is the problem
     
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  6. BlackC55

    BlackC55 Authorised Forum Sponsor Authorised Forum Sponsor

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    C43 AMG with a 55 engine and supercharger, E55 AMG, S500, etc
    The labour time is only 1.6 hours. I think it will be the heater valve.
     
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  7. OP
    OP
    bigjim

    bigjim Hardcore MB Enthusiast

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    Thanks Chaps, quick update, I checked last night during cooler temps and the damn thing was still blowing freezing cold.

    When I started the car this morning it appeared to be working normally and was absolutely fine all journey - so i guess something is sticking.

    I'll wait for it to happen again and scream down to MB Cribbs to plug it into STAR.

    Many thanks
     
  8. BlackC55

    BlackC55 Authorised Forum Sponsor Authorised Forum Sponsor

    Messages:
    18,741
    Joined:
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    Location:
    Horndean, Portsmouth, Hampshire, Southsea
    Car:
    C43 AMG with a 55 engine and supercharger, E55 AMG, S500, etc
    The Star wont often give you a fault code for this fault. It actually tells you bugger all about this heater motor.
     

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