A replacement garbage disposal may have a factory plug in the dishwasher inlet. If the dishwasher hose is connected there and the plug remains in place, the dishwasher can fail to drain even while the kitchen sink drains normally. Kinked hoses and other installation issues can look similar.
Compare what worked before and after the swap
Note whether the dishwasher drained normally before the disposal replacement and whether the sink still drains. Stop repeating cycles if water remains in the dishwasher. Share the disposal model and the date it was installed.
Have the installer check the discharge path
Ask the installer to verify that the disposal inlet is open according to the model instructions, then check the hose route and connection for restrictions or leaks. A completed check should include a normal drain cycle and a look under the sink while it runs.
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