Is the defrost control assembly the right part to fix this

Please make sure to click on General above and select the correct appliance type first.

Brand: Kenmore Elite Refrigerator
Model Number:795.74305810
Main Symptom: Ice buildup
What happens & when: Ice buildup behind the left vegetable drawer

Error Code (if any): None
Parts or tests already tried: tried replacing the door seals - no change
Photos / video link:

I’d suspect the defrost heater MEE62105201 or the defrost sensor(s) 6615JB2005R in the fridge section if you don’t seem to be having any issues in the freezer section

Check the defrost heater for continuity. You can check the sensors by placing them in a glass of ice water for 5-10 minutes to bring them down to 32°F and taking a resistance reading, should be around 30kΩ.

https://www.appliancepartspros.com/lg-heater-sheath-mee62105201-ap5605316.html

https://www.appliancepartspros.com/lg-controller-assembly-6615jb2005r-ap5325101.html