We have had our counter depth side by side GE Profile Artica Refrigderator going 3+ years without any problems. Last month our freezer got warm and thaw all the food ice when the freezer setting was set to 5 (0-9, 9 coldest).

We cleaned out he freezer and adjust the freezer settings from 5 to 7, which cause the freezer to work again. Today, Freezer was warm again and melt the ice causing icles in the freezer. Checked to see if the fan was running for the freezer, but no fan movement. Frigde side was working fine with fan and cold air movement. Adjusted the freezer settings from 7 down to 0 and then to 8, waited for 10 minutes and the freezer fan kick ON and blast of cold air is working again.
What should I do to check and/or what's broken on this applicance?
Thanks.