Freezer 50dg not cooling, compressor "HOT" fan working.Inside thermostat works, now set at max.
Since compressor works I am thinking the problem is a switch or a thermal thermostat. 
What I do heard is the strong motor that tipically sounds when the whole refrig is working normally.
Cannot afford to buy a new one, I am very handy so I hope I can fix it.
Thank you. 
If the compressor is running, the condenser coils will be warm. If so, either you have a major refrigerant leak, or a bad compressor. Pull the freezer back panel and check the frost pattern.