Is there is anything I can or should do about a 12 year old
refridgerator in my workshop. It is a medium size house appliance
that I bought used for $200. It has worked well, but has recently
quit cooling to some extent.

The freezer (separate compartment on top), will barely keep ice and.
I can put Cokes of beer in the freezer and they will not freeze.
Nice and cold to drink though.

In the refrigerator part, the temp runs about 50 to 55 degrees.

I cleaned the dirt off the fan located at the bottom back of the
unit. Didn't think it would help, and it didn't.

I doubt that the unit is worth the $50 for a service call, + any
parts. Not even sure someone could fix it. Is there anything I can
or should do to see if I can fix it.

Thanks in advance for advice,

Bob-tx