Clear ice at the back of the fridge
I have Bosch fridge freezer which has separate controls, compressor for each half, can even even switch off fridge & leave freezer running if I'm away.
I wish our Zanussi DF 62/26 was like that!
We've lived with the problem of clear ice at the back of the fridge for a few years now but haven't established the cause yet. We have checked the door seals, drain hole etc. and we have no reason to suspect that the thermostat is faulty although we never have to have it up very high even in the summer. The 'stat has been replaced once, some years ago, but for a different problem.
In all other respects, the fridge and freezer are working fine so there appears to be no reason to replace it unless it is very energy inefficient. Perhaps I'll plug it into a power meter to monitor its electricity usage.
My wife thinks the fridge is just too full especially with jars. We do try to use things up and avoid buying them again but people keep giving us chutneys, pickles and preserves! My in-laws give us any bottles of sauce they've tried but didn't like.
One thing that only occurred to me today is that we have an ongoing subsidence problem with the house and the floor is not level as a result. I put a spirit-level on the top of the fridge a few minutes ago and it appeared to be tilting forward but I've tried again just now and it's almost perfectly level! I'll do some more scientific checks over time with a better spirit-level just to be sure.