The dishwasher drain pump forces water up into the spray arms. During the drain cycle, the pump directs the water into the drain hose. The pump assembly is mounted beneath the basin, in the centre of the dishwasher. There are a few reasons why your dishwasher won't drain. You may have an issue with your dishwasher's drain pump. To determine if the drain pump is defective, check the pump motor for continuity using a multimeter.

 

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