On Thu, 29 Aug 2013 12:45:42 GMT, AnthonyL wrote:

It is an AEG under counter freezer and sits next to a sister fridge as
they have for around 20yrs.

At 20 years old it may have lost suffcient refridgerant through a
tiny leak to now struggle. Or the compressor might just be worn out
and not able to compress the gas well enough any more.

--
Cheers
Dave.