If your dishwasher is making an occasional high pitched noise this most likely is normal providing there are no other issues with the other functions of the machine.
The dishwasher motor is responsible for powering the unit's different parts, such as the spray arms and the water circulation pump. It may produce a whiny or screeching noise .
Also, it is possible that the high-pitched noise could be due to standard dishwasher operation. Most dishwashers generate some noise during the wash cycle as they clean dishes and circulate water.
However, if you are hearing this noise and other functions of the dishwasher are not operating properly please do contact us.