Help no heat! W203

Discussion in 'Engine' started by C32Graham, Jan 19, 2016.

  1. C32Graham

    C32Graham Member

    Messages:
    49
    Joined:
    Oct 2, 2015
    Car:
    W126 300se E34 520
    Not sure if this is engine or interior tbh but bit of an issue as its -5 this morning!

    Car is a 2003 C32.

    I have always thought that the heating has been poor on the car but never really worried. This cold snap has proved that its barely working at all. At best all I get is luke warm air after about 30mins.

    I've done the reset and it just leaves the 2 lights flashing, I have no clicking noise to suggest a broken valve and I can hear all the air moving about during the test. I understand this means that its logged a fault. When looking through the history I found a receipt that notes post water pump change:
    "unable to test heating due to heating system fault - customer aware"
    so sounds like its not a new thing.

    Any hints or tips? Bloody typical as Im trying to sell it!!!
     
  2. Chrishazle

    Chrishazle Hardcore MB Enthusiast

    Messages:
    3,118
    Joined:
    Nov 13, 2008
    Location:
    Nr Ashford, Kent
    Car:
    2008 S204 C220CDI Elegance Estate Auto, 1993 Porsche 968 Tip Cab.
    On my 203 this was part of the effect of a faulty thermostat, the other effect being that the engine temperature never got above about 60 instead of getting to 80-90. Mine was a C270, wonder if you have the same (easily fixed) problem!
     
  3. OP
    OP
    C32Graham

    C32Graham Member

    Messages:
    49
    Joined:
    Oct 2, 2015
    Car:
    W126 300se E34 520
    Sadly I think not. Engine comes up to temp fine and sits at 85-90 fine.

    Good shout though!
     
  4. OP
    OP
    C32Graham

    C32Graham Member

    Messages:
    49
    Joined:
    Oct 2, 2015
    Car:
    W126 300se E34 520
    For a bit of closure. Was at the garage yesterday. Diagnosed as either water pump or thermostat. Car had a water pump last year so booked in for a thermostat later today. Thank god, a nice cheap fix!
     
  5. Rory

    Rory MB Club Veteran

    Messages:
    7,265
    Joined:
    Mar 12, 2005
    Location:
    Cheshire, UK
    Car:
    C270CDi Estate (late 2004 facelift model)
    If it gets up to temp OK, then odd that the heating is only like warm.
     
  6. grumpyoldgit

    grumpyoldgit Hardcore MB Enthusiast

    Messages:
    2,604
    Joined:
    May 7, 2012
    Location:
    Stourbridge
    Car:
    C270CDI Avantgarde SE
    Suggest you get them to check that problem with reseting the heater flaps while they're doing the stat.
     
  7. grumpyoldgit

    grumpyoldgit Hardcore MB Enthusiast

    Messages:
    2,604
    Joined:
    May 7, 2012
    Location:
    Stourbridge
    Car:
    C270CDI Avantgarde SE

    Did a new stat solve the problem?
     
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