** this is a FREEZER, he speaks of and not a refrigerator /freezer.**
The same could be true for a frost-free refrigerator. Both are basically similar appliances and suffer the same problems.
** it sounds low on refrigerant. **
That is
one possibility, yes. Depending on what the appearance of the evaporator is, it could very well indicate a sealed refrigeration system problem... although not necessarily
low on refrigerant which is actually fairly rare.
JFYI
Dan O.
www.Appliance411.com
The Appliance Information Site
=D~~~~~~