Liebherr CUN 3033 Index 23/147 refrigerator compartment evaporator sensor fault

I have an approximately 8-year old Liebherr CUN 3033 Index 23/147 that has developed a fault.
Further information I have on the fridge is as follows: Service No 0908976-00 and Serial No 46.336.561.6
The front page of the instructions booklet also has a series of numbers: 061213 7082847-00 but I don’t know what these numbers are.

The super frost icon flashes together with the 3 degC bar, which from what I read is a refrigerator compartment evaporator sensor fault.
I am not technically skilled to do any more in depth diagnosis or to repair the fridge on my own.

The fridge flashes the above mentioned the fault code and it occasionally beeps – three short beep in quick succession, repeating every few seconds – but other than that it seems to be working. The beeping can be muted, occasionally for only for a very short time, but other times the fridge does not start beeping again for many hours. On rare occasions when I open the fridge the fault code is not flashing and all seems normal – flashing and beeping resumes shortly after.
The fridge has been completely fault free until this occurred.
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I would like to know from the community experts if this is likely to be a repairable fault and any recommendation for someone near me who could do it. I am struggling to find a local (East Cheshire) business who would even look at the fridge. If any member of the trade is willing to repair the fridge please get in touch.