The problem started that the refridge was not staying cool, There does not seem to be a bunch of cold air being blown in to the compartment. I removed the damper and it was cold again for a couple of days. Now I also notice the air return in the bottom left side in the refidge side has ice in it, I replaced the automatic defrost control board cleaned the coils, but still no cold air blows through the damper. The fan is running and it does not seem to shut off also. Can someone give a clue? Thanks for your help