[rpustelnik]

The dishwasher's not cleaning well. I've been through the water valve, spray arms and filter. All looking good, but I noticed the upper spray arm doesn't move when I start / stop the machine. The hose is clear and no obstructions in the impeller. Water does spin the lower arm. I can't see the water spraying because the machine stops before I get the door open.
It looks to me like the one pump ought to be supplying both circuits. Any help before I buy a new pump?

[PS Staff - Sheila]

Check the wash impeller for damage.

If there is damage to the impeller it will not be able to force the water up to the upper spray arm.

Here is a the wash impeller.



Here is a link to your dishwasher model DWU7300BAX.

[rpustelnik]

Thanks. I saw no damage but did not remove the impeller. I'll take it out for a closer look.