I have ice build up in on freezer coil and ice under crisper drawer

Hello
The ice build up is caused by a plugged drain issue. This unit has two evaporators, one in the refrigerator and one in the freezer. Normally the refrigerator drain plugs up with calcium deposits and needs be be cleaned with co2 or air pressure. The 1F error is abnormality of BLDC FAN Motor for Ice Making. It is caused when feedback signal isn’t over 65 seconds during BLDC FAN motor operating. Possible causes Poor BLDC Motor connection,DRIVE IC, and TR. See technician link below. Matt Ace technician