We have an older Amana fridge that we've quite enjoyed. The other night I noticed that the fridge was warmer than usual. I did some research online, and after realizing that the freezer was working fine, I ended up determining that the evaporator fan motor was bad.
For anyone troubleshooting an older Amana it's good to know that they have a Jazz board (mainboard). For my particular unit, there were quite a few onboard tests that you could complete. I noticed that the mode to turn on the evaporator fan did nothing when it should have.
This almost sealed the deal for me that it was the evaporator fan motor, but I wanted to be certain. So, I went out and bought a multimeter to check the motor's continuity. The multimeter tests confirmed that there was indeed no continuity.
Overall, not too difficult of a repair. Just go slow to not damage any evaporator fins and you'll be good to go. Always make sure the power is unplugged on your fridge while working on it!