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Liebherr freezer temperature rises up occasionally so the alarm is beeping.

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  • Liebherr freezer temperature rises up occasionally so the alarm is beeping.

    Hi guys,

    Could somebody help me to figure out what is wrong with my freezer, please?

    The freezer temperature suddenly rises up (from -20C to -5C for ex) and alarm starts beeping. After about 3-4 hours it gets back to normal (to -20C). It happens sporadically. Sometimes it happens 1-2 times in 24 hours, sometimes there is no alarm in few days although I could notice that the temperature rises up to -8C.

    I removed a cover in the freezer chamber and found that the evaporator is fully covered by ice despite of it is self-defrosting system. I defrosted it and dried up. I hoped it would fix the problem with the temperature jumping. It worked more or less OK for 2-3 days. I only saw that the temperature rises up from -20 to -16. But today the alarm started to beep again. The temperature reached -5C. Apparently something is wrong with the defrost heater, some sensors or the controller. How can I detect the faulty part(s) and what would be a replacement parts number(s)?

    The model is:
    CNes 3866 Index 20B / 001
    Service Nr: 9988398-02

    Thanks
    Last edited by OleM; 01-07-19, 05:19 PM.

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