Tabletop freezer suddenly stops freezing

Hello Experts! A couple of years ago, we bought a Belling table top freezer – I believe that the model number is BL45WH. It’s been working fine, and two days ago, we noticed that the food inside was starting to thaw. We took the food out, but kept the freezer going with an ice tray, to see what would happen. The tray never froze. We’ve tried plugging it into another outlet today, but after 3 or 4 hours, there is no sign of the ice tray freezing. There is also no thermostat that I can find anywhere, to adjust the temps. When I plug the freezer in, I can hear the motor start up, and hear the sound of water (refrigerant) circulating around. The compressor feels warm to the touch – if that means anything. Is there anything else that I should be able to check (before I dump this and have to buy another one??). Thanks for any info or advice you can give!!