What is the model number of your unit, please?
Sounds like it might be a bad thermostat.
Have you tried putting it on 1 just to see what happens? It would be nice, albeit a bit embarressing, (don't worry I promise not to laugh........too much) if this was the problem.
I will need the complete model number if you have it, please. The * indicates that there may be more.
That number does not sound familliar, but I will look through what service manuals I have for amanas' and see what I can see. I will return shortly. (10 minuits)
I do have a manual that covers your unit. It is a general service manual that covers 19, 20, and 22 cubic feet bottom mount refrigerators in general. Any special features will not be covered.
I will upload it for your retrival, It will take about 15-30 minuits depending on the server load.