Frigidaire Freezer Problem

This weekend I noticed that my Frigidaire side by side freezer was not freezing. Unit is only 8 months old, so just trying to check the simple stuff first before I wave the warranty flag.

Freezer stays in the low 20s. Unit has a digital thermostat for temperature control. Every once in a while it will lie and say it's a 0 or -6, but it's not. Popsicles aren't frozen solid. The refrigerator is holding steady at 36 no problem. I've pulled the back panel off. Coils are as clean as day one. I can hear the compressor kick in from time to time, so I think that's working.

The freezer is staying cold, but it's not freezing anything. And it's not making ice because of this either. Anybody guess what to check? I've unplugged it a few times in hopes of resetting the computer. We're leaving town tomorrow and will be gone for a week. Would like to not have to empty the thing before we leave. Did I mention that wife is paranoid about this ? (happened to her 3 times past).