Liebherr fridge / freezer problem Cnes 3366

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  • August 21, 2012 at 9:07 am #71056
    tm67b4
    Participant

    Hi All

    I’ve got a Liebherr Cnes 3366 index 20A fridge freezer. The last few weeks we have noticed that the alarm goes off strangely sometimes, but then two days ago found that the fridge section was at room temperature (according to the display and a thermometer verified that).

    The freezer had increased to -3, but then reduced to -8. We placed the milk in the freezer last night and this morning, despite the display showing -20, the milk was not frozen.

    When opening the fridge door, the fan at the back is not ‘spinning down’. I have checked the sensor behind the middle drawer in the freezer and it is free of moisture / ice. Behind the cover at the back of the freezer, I am unable to see the end of the other sensor cable as it seems quite icy there.

    There are no error codes being shown. What is the likely cause? I am more than capable of performing any electronic sensor changes / cabling.

    Since the temperature in the freezer is incorrect, I assume that at least this sensor is faulty.

    Thank you in advance.

    August 21, 2012 at 12:10 pm #379907
    tm67b4
    Participant

    Re: Liebherr fridge / freezer problem Cnes 3366

    I have found the service manual:

    http://www.putlocker.com/file/A46A896FA712AE2A

    http://mir.cr/02G1ZWQE

    I’ll measure the thermistor values later to see if they are in-line with what they should be.

    August 21, 2012 at 1:19 pm #379908
    tm67b4
    Participant

    Re: Liebherr fridge / freezer problem Cnes 3366

    It seems it is a NTC 4.7K with a beta of approx 3780. A closely matching thermistor for testing:

    NTCS0603E3472FHT

    Though it is too small to be practical and is not encapsulated

    August 27, 2012 at 9:22 am #379909
    tm67b4
    Participant

    Re: Liebherr fridge / freezer problem Cnes 3366

    Found the problem – The connector for the freezer reed switch that plugged into the main PCB had been forced on from the factory, causing a intermittent contact with the edge of the PCB.

    August 8, 2017 at 3:38 pm #379910
    tmelsby
    Participant

    Re: Liebherr fridge / freezer problem Cnes 3366

    tm67b4 wrote:I have found the service manual:
    http://www.putlocker.com/file/A46A896FA712AE2A
    http://mir.cr/02G1ZWQE
    I’ll measure the thermistor values later to see if they are in-line with what they should be.

    Service – repair manual found here:
    (Liebherr also calls it Appliance documentation CN(es) …6 from index 20)
    http://www.eserviceinfo.com/download_st … rlid=65726)

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