I cannot find any info on the given model number.
Please check it.
Is the compressor running continuously other than when it goes through a defrost cycle?
If yes then it is probably a defrost or a sealed system problem.
If no (it cycles on/off) then it is probably a control/thermostat problem.
If is cylces fast (clicks on.off) then it could be a compressor or compressor start device problem.
I would check the door seals first just in case they are letting in warm air.