Hi MikeThanks for your response. The only section I touched was the fridge as the freezer has no issue and is not defrosting. As the fridge is not supposed to frost I had the fridge open used the back end of a knife to clear all of the ice that was frozen to the back of the fridge and then cleaned out the fridge. This process took maybe 40 minutes and all seemed fine for maybe 10 days until I could see the ice building up again.
Yes when I cleaned the fridge I removed the bottom draw and cleaned the bottom (this process has been repeated on 4/5 occasions but the same issue re appears). The freezer is almost never full, generally about half full but no once around the vent or ice on the back walls... The only ice is on the back wall of the fridge in the middle section.
No it is a think layer of frost like ice, the kind of thing I would expect to see in Toronto in February...
Haha. The fridge is fitted so I can't physically move there have been periods when the fridge is almost empty and periods where it has been full at the moment it is medium to full, nothing is currently against the back wall otherwise it will freeze..
Thanks for your attempts here, unfortunately I don't see this helping, the ice build up is huge and there are none of the issues you have mentioned obvious, the drain hole seems clear. I'll need to get an engineer in. Thanks for trying.