What does it mean when the WASH light is flashing on my GSD4210?
A flashing WASH light means the drain is blocked and so clogged that the dishwasher cannot continue to operate satisfactorily. You should check the air gap, check for a kink in the drain hose, and check for stopped-up drains. Note that warranty service does not cover household drain problems. (Page 11)
From the official GE GSD4210 Top Control Dishwasher manual, page 11
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