Tip & How-To about Dishwashers
the excellent description you give the most likely cause of this
problem is the check ball and funnel in the soil collector.It
drains fine sometimes but sometimes it doesn't drain but the motor is
turning. If the motor is turning in the drain cycle most likely the
motor and timer are okay. The motor on this dishwasher runs one
direction to wash and one direction to drain. You can listen for this
but there is another more likely part causing this problem.
The idea is that in the wash cycle the circulation of the water brings food particles into the chamber. In the drain cycle the circulation is reversed and the check ball is suppose to seal the funnel off so all of the food and soils go down the drain. If the check ball doesn't seal the funnel then the water will not drain but go back into the tub.
Most likely your problem is with the check ball and/or funnel. There may be something in the chamber preventing the check ball from sealing the funnel all of the time. Sometimes it does but sometimes it doesn't.
The images below will give you an idea of where the soil settler is located. You can remove the toe panel but must likely you'll need to pull the dishwasher out to access it.
This is a job I'd recommend a technician do. The funnel , check ball and the soil settler/separator . You will also need some RTV sealant but even technicians have difficulty with this repair and I suggest you let the technician get the headache.
The check ball and funnel can definitely cause an intermittent drain problem.
I hope this information is helpful resolving this problem.
Posted by Byron... on
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