Joe C. for Model Number WM3988HWA There's a half ball diffuser that goes into the tub. It fell out. It either goes with the F315 Bellows or the vent F310 Are you familiar with the part ? It doesn't show on part sheet.
Answer Hello Joe, These are called mushroom valves 4769ER4002A large mushroom valve and 4769ER4001B small mushroom valve. These go into the openings under the hoses on top of the outer tub. Read More... Answered by AppliancePartsPros.com | Tuesday, June 13, 2017