Kenmore Elite 795.74025.412 frost in freezer

[ilyaz]

Good Day Everyone!
We have a 5-year old Kenmore Elite 795.74025.412 French Door fridge fridge that so far worked fine. Now it has frost in freezer. Reasons? Ways to fix? TIA!

 

[kok328]

Could be bad/stuck defrost timer or bad defrost heat element or bad control board or bad door seal.
Yea I know, not much help.