Ice build up in freezer

Refrigerator & Freezer Repair
,
1

Ice build up on back wall of freezer. Where in the fridge is the control board located?

2

Here are your parts
Parts for KitchenAid KSRJ25FXMS02 Refrigerator - AppliancePartsPros.com

Take a look at section 11.
I think Item 9 is a power supply so Item 1 is probably the control board.

See the attachment for the tech sheet just in case you do not have it.
KSRJ25.pdf (821.8 KB)