Hey I had that same issue with my old fridge, a guy on YouTube helped me solve it! Take a short piece of the copper ground wire from a length of Romex and wrap it around the heating element, then have it point down into the drip area. It should conduct enough heat to keep the fins from icing up. It's not ideal but it saved me from replacing the (I think) evaporator fan for a third or fourth time, plus all the ruined food. Also had to replace the mainboard on the pile of junk fridge. So glad I don't own it anymore.