Over the last four years this freezer has occasionally run continuously about four or five times, sometimes resulting in the temperature falling to -32C. Switching off at the mains and restarting after 30 secs or so sorts the problem but it then recurs again some months later. Liebherr understandably will not accept it as a warranty problem so I am left on my own.
Being an intermittent fault I expect it will be very difficult to pinpoint and I am reluctant to start an expensive part by part replacement program.
I would very much appreciate any advice on what might be the cause of the problem particularly from anybody who has experienced the same fault.