A dishwasher that will not drain leaves a pool in the tub. The blockage is usually easy to reach.
Clean the Filter and Sump
Food debris collects in the sump and blocks the drain path.
Fix: Scoop out debris and rinse the filter under the lower spray arm.
Check the Drain Hose and Disposal
A kinked hose or a new garbage disposal with the knockout plug still in place stops drainage.
Fix: Straighten the hose and, on a recent disposal install, remove the knockout plug.
Clear the Air Gap
The cylinder on the sink can clog and back water up into the tub.
Fix: Pop the cap and clean out any debris inside.
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