Samsung twin cooling plus refrigerator evaporator fan not turning on

[dkfixit]

My fridge started forming ice near the vents and I confirmed the evaporator fan was not running. I connected to a battery and confirmed it did not spin and ordered another fan to replace it with. New fan spins with battery power applied. I connected to the fridge and it’s still not working. Fridge stays cool to the correct set temperature but after a few weeks, ice will start building up and eventually stops cooling. What would be my next step in troubleshooting? Thank you.

[strumpfman]

check if there is power going to the fan motor. Either from the main board or at the socket with doors closed!

[dkfixit]

Thank you so much. I did not realize the difference fan only spins with the fridge closed. I put a magnet to the edge to trick it into thinking the door is closed and the fan kicked on. I appreciate the help.