Just over 1 year old, my Amana fridge section of bottom freezer model is too warm. Freezer is fine. Fan is not kicking on by itself to move freezer air to fridge. Sometimes the fan starts like it should. Sometimes the fan starts, stops right away then starts again as it should and stays on. Sometimes we have to "tap" the freezer temp control area and like magic, the fan starts. Any ideas? Model ABB221FEW2.