I cannot find any info on the given model number.
Kenmore numbers are usually 3 digits, a period and then an additional 6 to 8 digits.
Find your model number - AppliancePartsPros.com

Is the compressor running?
Usually you can hear it but you should also be able to feel it vibrating.

If the compressor is on all the time (other than when in a defrost cycle) then remove the cover in the freezer so you can inspect the evaporator coils.

If they have no frost or just frost in one area (usually where the freon enters the coils) then you probably have a sealed system problem.
This will be an expensive repair as you need a pro. Often it makes more sense to put the dollars towards a new unit.

Be sure that the compressor has run at least an hour before checking the above. If you do it during or shortly after a defrost cycle you will come to the wrong conclusion.