Re: Sandstrom SFF4DS11
I have never worked on this make but looking at the diagram I would say check the rear of the appliance to see if the external fan is working and the condenser is clear off fluff.
If the fan and condesor is clear. then You can then check to see if the compressor is running hot / low on gas or compressor fault.
If there is some cooling in the freezer then I would check it has defrosted itself correctly and the internal fan is working before breaking into the system.
Hope this helps see you next week.
Bob