Bruce for Model Number WFW9400SW02 I was getting an f21 error and replaced the drain pump in December, then it returned this month, replaced the pump again. Now i am getting an f20 error running dianostics and the drain pump works but keep running. After resetting the washer it through a f28 error code. Not sure if I should replace the pressure switch or the main control unit or both.
Answer Bruce, With getting the F20 code which is for no water being detected and the F28 which is a communication issue between the CCU and MCU then this will most likely be a CCU error which is part number WP8183259. Read More... Answered by AppliancePartsPros.com | Friday, April 22, 2016