Dishwasher not draining: what to check before you call

Record whether the cycle completed, stopped with a code or was canceled. Check whether water is only below the filter area or covers the tub floor. The manual may describe normal retained sump water. Take a photograph from above without putting your hand into cloudy water.

Standing water after a partial cycle does not necessarily mean the pump failed. Controls may have stopped for another reason, and a drain restriction can be outside the dishwasher. Note any recent sink drainage trouble or installation change. Those details are useful without removing the appliance or running another leaking cycle.

Read the exact model’s instructions for canceling a cycle or starting a normal drain function. Do not assume holding a button for a generic number of seconds is correct. Observe the display and retain any message before clearing it through the permitted procedure.

Do not repeatedly command a pump that sounds strained or operate a leaking dishwasher just to see whether it eventually drains. A brief normal drain command, where the manual allows it and there is no leak or hazard, is different from repeated diagnostic cycling. Stop when the same problem returns.

Locate the manual’s filter removal and reinstallation directions. Allow heat to subside and follow the required power precautions. Remove loose food debris only from areas intended for owner cleaning; debris may be sharp, and cloudy water can conceal glass or broken dishes.

Rinse and reinstall the filter exactly as directed. A filter that is not seated correctly can affect operation. Do not extend filter cleaning into pump-cover removal or hidden impeller access. Bosch’s drainage guidance stresses following the manual and considering sharp debris; a conservative check can stop at normal filter care.

Observe whether the sink drains normally and whether a disposal or other plumbing fixture was recently changed. A shared drain path may have an obstruction or connection issue separate from the dishwasher pump. Mention a new installation or change when arranging help.

Do not disconnect plumbing, remove a disposal inlet plug or put your hand inside a garbage disposal. Those actions can introduce water and electrical hazards. A slow sink, backing-up drain or overflow may call for a plumbing assessment. Appliance service should not assume that replacing a pump fixes household drainage.

If the drain hose is already visible inside an adjacent cabinet, note an obvious pinch or kink without undoing connections. Do not pull a built-in dishwasher out of cabinetry, remove the toe panel or alter the hose arrangement based on an unrelated installation diagram.

Routing requirements depend on the model and installation. A concealed restriction cannot be ruled out just because one hose section looks normal. The technician can assess the appropriate appliance drain path and identify when plumbing work is separate. Photograph accessible routing if it helps describe the situation without exposing private household details.

Find the model label on the accessible door edge or the location identified by the manual. Note the cycle, exact message, quantity and location of water, any leak and recent plumbing changes. Describe whether the unit is panel-ready, a standard built-in or a drawer dishwasher.

For a drawer model, state which drawer is affected and whether the other operates normally. Safe access and model-specific parts matter. Leave hidden mechanisms closed while waiting; a technician can distinguish drain-pump operation, internal restrictions and outside plumbing issues without assuming a cause from standing water alone.