I wish there was an answer to this issue because it's the same problem I'm having. I replaced the inverter. I checked all the coils, the fan motor, and everything is in working order. I have a new motherboard and thermistors on the way and I'll see if that resolves the issue.... very frustrating that there isn't more information out there on the specific problem of air blowing to the freezer that isn't cold and no air blowing to the fridge....