The top rack spray arm doesn't work because of low water pressure from the wash motor or it's clogged with debris.
If the top spray arm looks clear of debris, remove the lower spray arm and lower feed tube to
access the wash motor. Remove the 4 torx screws and the filter
(accumulator assembly). Remove the torx screw and the inlet protector
that covers the chopper assembly. Make sure the chopper is not broken
(broken chopper will fill with debris and block water flow). While
holding the chopper blade, reach inside the "D" shaped opening on top
of the motor and spin the wheel/motor by hand in each direction to make
sure either the chopper gear or the motor gear that drives the chopper
is not broken. Replace the chopper if necessary (part # 8268383). If
the motor gear is broken, replace the sump and motor assembly (part #
8535150). Remove any debris from the sump area in the process.
You
don't have to shut the power off to the dishwasher because the door will be open, but if you feel more
comfortable, do so.
Good luck!
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whirlpool quiet partner ii
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