Freezer not cooling properly...please help..stumped

Hi All,

Recently my freezer on my side by side Samsung has not been cooling properly. The temp stays around 46 degrees now. I took it all apart and the evap looks fine (not iced up or anything). I replaced the Thermistor and Bimetal sensors and that didn’t seem to do anything. No errors show up on the self diagnostic test either. Fridge side is working fine. Does anyone have any ideas as to what the problem may be?

Thanks