It doesn’t matter what kind of refrigerator or freezer you have, every brand operates on the same principles. When you see snow looking ice (called rime ice) in the freezer, then somehow warm air is seeping into the compartment. The most common explanations are:
On this specific call, the customer had recently had her freezer door gasket changed by another company. What they forgot to do was use a heat gun to mold the new gasket to the door. Because they forgot to do this, there was a 1/2 inch gap at the bottom letting warm air in at all times.
Eventually, so much ice had built up it was preventing the door from closing all the way, further worsening the issue.
If you need your refrigerator repaired or inspected, you can always call or request on appointment online!