Ice maker not making ice. Removed ice maker and checked, nothing seemed to be hangin up. Water to the door works so I know there is water to the refrigerator. I made sure the drop tube was not frozen up and it was fine. I unplugged and reset the unit. When I closed the flapper on the left side of the door the red light on the right side came on for a second or two and then went out. Unit not cold enough to make ice? I know there are codes for when the red light blinks but what does it mean when it is not on. Thanks.