2008 335d climate control/aircon not working- no cold air

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  1. 2008 335d climate control/aircon not working- no cold air 
    #1
    Bimmer Fan
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    jimwalsh1972's Car Details
    Model of Car:
    335d m sport
    Year of Manufacture:
    2008
    Transmission Type:
    auto
    Car Body Type:
    coupe

    Join Date
    Jun 2012
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    sheffield
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    As per subject line, the climate control seems to have packed-in on my car. All the lights and controls behave as normal. The green light on the snowflake symbol comes on when pressed and the fan/blower kicks in, suggesting that the system is trying to control the cabin temperature. However, the air never comes out at anything less than ambient. The heating function still works.
    I must confess that I cannot be sure whether the aircon failure is the culmination of a gradual reduction in efficiency, or whether it is a sudden fault. It came to light about three weeks back, when the missus borrowed the car for a long trip on a very hot day. I had several, increasingly desperate phone calls from her, asking how to get the aircon working. I ran through all the adjustments I could think of, but somehow imagined that she must have failed to follow instructions. When I got the car back, it transpired that the system was indeed failing to produce cold air, no matter what.
    Hoping that low refrigerant level might be the root cause of the problem, I took the car to Kwik Fit for vacuum removal and replacement. No change (but no charge either, since I didn't get my =or>10% reduction in air temperature).
    I have checked fuses 6, 77 and 88 which, according to the fusebox diagram, are involved in aircon. No problems with these.
    So, my question is, where to next? Is there anything else I can easily check before I resign myself to GBH of the wallet at a garage or aircon specialist? Incidentally, would people here recommend an aircon specialist or a BMW dealer?
    Advice appreciated.
    Regards,

    Jim.
     
     

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  3. Air con on 525d not working 
    #2
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    Daver111's Car Details
    Model of Car:
    525 d se
    Year of Manufacture:
    2003
    Transmission Type:
    Automatic
    Car Body Type:
    Saloon

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    Mine is doing exactly the same as yours, one thing I have changed but did not fix mine was the hedghog switch (If yours has one) just above your left foot on the drivers side. I was told that controlled the air con system. All the right things happen on mine, heater works booster fan comes on when air con selected but no cold air, had it re-gased and leak tested no joy. I have been told to check pressure sensors in the system (Where are they??) You never know I may need the air con one day with the uk weather.....
     
     

  4.  
    #3
    BMW Crazed
    Car Details
    The Rookie's Car Details
    Model of Car:
    320D Sport
    Year of Manufacture:
    2003
    Transmission Type:
    Manual
    Car Body Type:
    Estate

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    Leamington Spa, Midlands
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    Next thing to check is if the A/C clutch is engaging (however breifly) when the A/C is selected on, if the clutch looks like it's turning the compressor then you may have a compressor fault.
    My 320D is in the same boat!
    2003 320D MSport Touring in Imola red
     
     

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  6.  
    #4
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    jimwalsh1972's Car Details
    Model of Car:
    335d m sport
    Year of Manufacture:
    2008
    Transmission Type:
    auto
    Car Body Type:
    coupe

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    Location
    sheffield
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    Thanks for the reply. A really basic follow-up question: what am I looking for to see whether the a/c compressor is engaging? Looking at the refrigerant filling/drain tubes and following the circuit to the front of the engine bay, there is a device that I imagine is the compressor. It looks to be an aluminium-bodied tning, located on the nearside upper part of the engine bay and it has a wheel that is turned by a belt. It sits just above the alternator and it can be viewed, from above, by removing a circular plastic clip-on insert in the cowl.
    From descriptions I have read elsewhere, I had the impression that the compressor drive wheel would have an outer portion that constantly rotates with the movement of the belt and an inner portion that is engaged (and rotates) only on demand, by means of a clutch. The thing I have been looking at rotates all the time, whether a/c is engaged or not.
    Cheers,

    Jim.
     
     

  7.  
    #5
    BMW Maestro
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    Dez-Derek's Car Details
    Model of Car:
    e39 523i SE
    Year of Manufacture:
    1999
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    Automatic/Steptronic
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    Sedan/Saloon
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    This will sound stupid from me, but have you turned the knob that is below the hazards, to the blue position?
    Last edited by Dez-Derek; 25-06-2012 at 16:26.

    Driven by experience and pleasure
     
     

  8.  
    #6
    BMW Fanatic
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    Dave F's Car Details
    Model of Car:
    525D msport
    Year of Manufacture:
    2008
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    Car Body Type:
    saloon

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    I thought mine had packed up too, could only get warmish air, then found the missus had been trying to make it warmer during the freezing cold wet weather last friday and turned the heat up via I drive turned the bars down to one and hey presto arctic bmw
     
     

  9.  
    #7
    Bimmer Fan
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    Daver111's Car Details
    Model of Car:
    525 d se
    Year of Manufacture:
    2003
    Transmission Type:
    Automatic
    Car Body Type:
    Saloon

    Join Date
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    Location
    Shropshire
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    I know this sounds dumb but what is the Idrive? also everyone keeps mentioning the knob turned to the blue postion????
     
     

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