KRMF706ESS04 Evaporator Freezing up

Refrigerator & Freezer Repair
1

Brand: Kitchen Aid
Model Number:KRMF706ESS04
Main Symptom: Coils Freezing up
What happens & when: I had a weird noise coming from the freezer. The fan was rubbing on ice buildup on the evaporator coils. I manually defrosted and tested the defrost heater. Had 30 ohms. I can feel cold air movement in the freezer. But after a week, it freezes up again. Any guidance would be much appreciated

Ty

Error Code (if any): No error codes
Parts or tests already tried:
Photos / video link:

2

Based on the model number and information the temperature and defrost sensor and the main control needs to be checked. Attached is the tech sheet for this model.
https://www.appliancepartspros.com/repair-help/refrigerator-repair-help