Bosch Dishwasher Error E24: Drain Error

The Logic Verdict

I watched the tech press Start, hold Reset until the display flashed 01, and let the dishwasher auto-drain before he touched anything else. He then pulled the sump guard straight out and vacuumed glass from the disposer nipple that the drain hose pushes onto. Follow that same sequence: prove the pump can run, then clear the physical restriction shown in the clip.

What It Means

E24 appears when the control energizes the drain pump but water still sits in the tub. On the units in the video, that typically means the sump passage is blocked or the hose is pinched where it meets the sink plumbing, so the pump sees back-pressure instead of flow.

Common Causes

1. Barbed disposer fitting clogged: The small nipple the host disconnects traps seeds, glass, and grease until nothing can leave the hose.
2. Loose sump guard: The white plastic guard over the pump intake can pop loose or pack with debris, starving the pump.
3. Impeller cavity jammed: Glass around the impeller keeps it from moving water even though the motor hums.

Step-by-Step Fix

1. Trigger the auto drain: Cancel the cycle, close the door, press Start and hold Reset for ~3 seconds. Bosch jumps to program 01 and immediately tries to drain—listen for flow to confirm the motor spins.
2. Remove any standing water: If the tub is still full, use a shop vac or sponge so you are not working underwater.
3. Lift the filter stack and guard: Slide the lower rack out, twist the cylindrical filter, then grab the small tab on the white guard and lift it free. Rinse both, pick out debris, and snap the guard firmly back down.
4. Inspect the drain hose connection: Under the sink, loosen the gear clamp, pull the hose off the disposer/barb, and check for gunk exactly where the tech found the glass shard. Vacuum or rinse until the nipple is wide open.
5. Reassemble and leak-check: Reattach the hose, tighten the clamp, pour a pitcher of water into the tub, and rerun the auto drain while checking for leaks and listening for an unrestricted whoosh.

Parts & Tools

• Bosch 00668104 Drain Hose Replacement

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