Dear Pete and Tony,
I seem to have a similar problem with my Liebherr CUN3033 fridge freezer. It’s 4 years old and for a few months has had a 4 beep alarm intermittently for high freezer temperature. I’ve changed the settings lots but manually checking the temperature it stays -10ish deg regardless of changing the set temp to much lower. There is also ice build up on the freezer back wall. The fridge side works just fine. I’ve cleared the ice but it accumulated again. Is this a freezer evaporator sensor malfunction? I can see a cream coloured sensor right in the middle of the back wall of the freezer. Rear wall fan in freezer works ok.
Any help is much appreciated.
Thank you in advance
Push