Diagnosed a duet today where I believe the CCU is at fault. F28 code with it dead after initial door lock & burst of water into tub. Door unlocks for a few moments then locks again & that is it.
1st test after manually evacuating water from tub tried to out into diagnostic mode. Went into & promptly displayed F28. After cycling thru several other combinations of numbers & letters the unit finally settled on C:00 & that was it. No more progress.
Next I checked the door latch mechanosm. Door unlock DLS2.1 TO DLS2.2 0 volts. Locked 122 Vac. At the door switch I have some continuity at the various combinations pins DL3.3,2,&1 but no voltages at any combinations door locked/unlocked.
No voltage to drain pump at all. Pump will run if jumped with 120Vac.
No DC voltage at MCU MI3.1,2,3. (Blue) I get voltage 120vac at (pink) MCU MS2.1 & 2 but only for a brief moment when door locks. Then a click in the CCU & the voltage dumps back to zero at MS2. Door latch remains locked. Machine is dead other than user interface lights.
I suspect that CCU is foobar.
My question is after listening on Voxer others have new problem codes with the replacement CCU from Whirlpool and also reading of problems from replacement boards here at home appliantology has any body experienced trouble with this particular unit WFW9200SQ02 & it's replacement board W10169230.
A second question is has any one sent this board to Fix your board for CCU repair. I do not particularly like the price tag of $250 plus Core charge from WP's parts suppliers.
Long winded & thank you for your feedback Patricio
Pardon me if I overlooked anything long tiring day. Tomorrow comes early