FixByModel
E24

Bosch E24: Dishwasher not draining, drain path blocked

The dishwasher could not pump out its water in the expected time, usually because the filter, drain hose, or siphon connection is restricted. Water is often left standing in the tub bottom.

DIY fix

By the FixByModel editorial team · Verified 2026-09 · Researched against manufacturer support & repair references (below)

Most likely causes

  1. Clogged tub filter or sump full of food debris
  2. Kinked, clogged, or damaged drain hose
  3. Garbage-disposal drain plug (knockout) left in place on a new disposer
  4. Loose pump cover beneath the filter
  5. Unsealed or blocked sink siphon/air-gap connection
The drain path — check in this order
1Tub
2Filter / sump
3Drain pump
4Drain hose
5Disposer / standpipe

Schematic illustration of a typical dishwasher — not your exact model.

Before you start — unplug the appliance and turn off the water supply. You'll be working near water and electrical parts, and drained water can be hot. If a step involves the pump, wiring, or opening the cabinet and you're unsure, stop and call a qualified technician.

Step-by-step fix

1Remove and clean the filterTwist out the cylindrical filter assembly in the tub floor and rinse it under running water to clear food and grease.
2Clear the sumpWith the filter out, scoop any debris, glass, or standing water from the sump so the pump inlet is clear.
3Check the drain hoseInspect the drain hose for kinks or clogs and straighten or clear it; make sure it is not crushed behind the cabinet.
4Check disposal / siphonOn a newly installed garbage disposal, confirm the dishwasher knockout plug was removed, and verify the siphon connection is open and sealed.
5Reseat the pump coverConfirm the pump cover under the filter is seated and locked, not loose.
6Reset and testReset per the owner's manual and run a drain/rinse cycle to confirm the water clears.

Still showing E24?

If you’ve worked through every step and E24 keeps returning, an internal part likely needs testing and replacement. That’s a job for a qualified appliance technician, who can measure the suspect part against the service-manual spec before replacing it.

Which models this applies to

Bosch dishwashers. All modern Bosch dishwashers using the digital E-code display (Ascenta, 100/300/500/800 series and EU Serie equivalents).

FAQ

What does Bosch E24 mean?

Dishwasher not draining, drain path blocked. The dishwasher could not pump out its water in the expected time, usually because the filter, drain hose, or siphon connection is restricted. Water is often left standing in the tub bottom.

What causes Bosch E24?

The most likely cause is clogged tub filter or sump full of food debris. Other causes include Kinked, clogged, or damaged drain hose; Garbage-disposal drain plug (knockout) left in place on a new disposer; Loose pump cover beneath the filter; Unsealed or blocked sink siphon/air-gap connection.

Can I fix Bosch E24 myself?

Usually yes. Start by working through the steps above, beginning with: twist out the cylindrical filter assembly in the tub floor and rinse it under running water to clear food and grease.