From what I'm reading everywhere that it sounds like the evaporator fan. We took the panel out of the inside of the freezer and can see the coils and a fan down at the bottom.. The coils are full of frost and the fan is blowing.. I don't really understand how their is so much frost as we just bought the fridge used about a week ago. Question is If the fan is blowing, is their maybe a differant fan? The fridge is a u2 frigidaire pure source plus..