Hello, I can help you with this. Is the temp colder in the bottom? Do you hear the fan below the ice maker go on when you close the door switch? The freezer fans are very unreliable in these machines.
When you push the freezer door switch with the door open, you should be able to hear/feel that fan moving if you do not hten you will need a new fan. These things fail all the time. The Part can be purchased here. Let me know if you need any further assistance. Thanks, Sam