Freezer cold, Refrigerator warm

I did some research online, and was sure that it was the evaporator fan motor that was not working. So I paid more for overnight shipping than I did for the fan motor to have it over-nighted. I removed the botttom freezer door by simply pulling out and lifting it up. I then removed the wire shelf by pulling it straight out. Removed the ice maker by removing the three screws that held it in place . Disconnected the the wire harness, and pulled it out. Then I popped off the plastic vent at the top of the freezer's interior rear cover. Removed the rear cover by removing the four or so screws holding it on to expose the evap fan motor and the freezer coil. Careful, the fins are fragile and sharp. I inspected the fan motor and it seemed to be working fine. I unplugged the fridge and plugged it back in. It went through a defrost cycle and I put it all back together again. Cranked the frige unit up to 7, and was able to lower the freezer to 4. It's been working ever since. Eventually I was able to lower the fridge back down to 6. Long of the short is I paid $60 for nothing.