Can I use powder detergent in the detergent dispenser?
Yes, but you must remove the internal tray when using powder detergent. Make sure the tray is in the drawer when using liquid detergent and removed when using powder detergent. Do not overfill the dispenser, as adding too much detergent may cause it to dispense too early into the washer.
From the official Whirlpool W11042232 Washing Machine manual, page 10
Have a follow-up question?
Answers from the official manual.
Common questions