This Public Service Announcement is brought to you today by Brother fixyourboard of Fixyourboard.com fame, providing fast, expert rebuild and repair of NLA circuit boards:

After replacing evaporator fan and having the main board rebuilt ... the new fan wouldn't run. Well it turns out that the new fan comes with a new wire harness BUT it only applies to certain models. It swaps some wires around and if you install it on the wrong model the evaporator fan doesn't get power!!! It looks just like the orignal (unless you look closely at the pinout). It seems the fan doesn't ship with the WP instruction sheet. Fan p/n 8201589, board p/n 2252159 and brothers, jumper harness p/n 2221077.

This has got to have caused a lot of head bangin' ! ??

Here's the instruction sheet. Sorry it's a png. Site didn't let me attach the pdf.

Here's the link to the PDF of the evaporator fan motor installation instructions: http://appliantology.org/files/file/867-whirlpool-fridge-8201589-evaporator-fan-instructions/

Source: KSSS42FK KA Built In Evap Fan not running after board/fan replacement