Check the water level, should be just below the heater, if ok, open the door a few times and check for water spray from the lower spray arm and also check that it is turning. If poor spray, twist off the tower above the lower wash arm, i think you turn it counterclockwise. Use a large adjustable pliers to do this.Then check under the wash arm for a worn gasket.
Also, remove the rear tub pump cover and check for blocking items at the pump inlet.
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