Bosch Dishwasher Error Code E:24

E:24 on a Bosch dishwasher indicates a drain fault: the unit completed a wash cycle without successfully evacuating the water from the tub. The control board detected that the drain pump ran but water remained in the sump. Causes range from a clogged filter and improper hose routing to a faulty backflow valve or a restricted heat pump impeller.

Running the dishwasher with an active E:24 error is not recommended. Standing water left in the tub can promote mold growth and odors, and continuing to run cycles without resolving the drain blockage can overstress the drain pump motor. Address the cause before resuming normal use.

Repair cost depends heavily on the cause. Clearing a clogged filter or adjusting hose routing costs nothing beyond your time. Replacing a backflow check valve typically runs between $10 and $40 in parts if you do it yourself, while a professional service call for drain pump or heat pump impeller repairs can range from $150 to $350 or more depending on labor rates and parts involved.

Start by removing and cleaning the filter assembly at the bottom of the tub, then inspect the drain hose for kinks and confirm it is routed with a high loop at least 33 inches off the floor. If the drain connects to a garbage disposal, verify the knockout plug has been removed. If the hose routing and filter are clear, check the backflow check valve for debris or damage and test the float switch connections and continuity before considering pump replacement.

A reset may clear the error display temporarily, but the code will return as soon as the dishwasher runs another cycle and encounters the same drain failure. The underlying cause, whether a clog, a kinked hose, or a faulty component, must be corrected for the error to stay cleared.