GE Cafe Ice Maker Section Not at 10 degrees

[Johnnypotatoes]

Model Number: CFCP1RKBDSS
Brand: GE
Age: 6-10 years

Our GE ice maker section is not getting down to proper 10 temperature or less. About 16-20 degrees is the reading after 4 hours. Normal refrigerator (37 degrees) and freezer (-1 degrees) temperatures. Tried the "Fan Speed Test" code 1-1 and did not feel much air at top inlet duct to ice maker section. Read the post on a blocked air duct path to and from ice maker section to freezer and the solution seemed a bit time consuming. Can you force many defrosts using the Control diagnostics via 1-4 to clear blockage?

[Johnnypotatoes]

Freezer and refrigerator temperatures are now normal -1 / 37 degrees after inspection of freezer coil, duct work to and from ice maker. (24 hours wait period).

Tried the "Fan Speed Test" for ice maker fan and fan does run.

Does any known how often the ice maker fan should run?

Under what conditions should the ice maker fan run?

It's looking like a main control board issue?

Any input????