What Bosch Dishwasher E24 Means

Bosch's current US error guidance places E24/E-24 in the drain system. The dishwasher did not see the drain result it expected. Bosch lists several possible locations: the filter and pump-cover area, the drain hose, the air gap or drain connection, and a garbage disposer connection whose knockout plug was not removed.

E24 is not a failed-pump verdict. It is also not Bosch's water-in-base leak-protection code; that is E15 on the relevant display family. Preserve the complete code and E-Nr before cleaning or resetting anything.

Check the Bosch Drain Route by Location

  • Filter and accessible pump-cover area: Food debris or another obstruction can restrict water leaving the tub, and Bosch notes that a loose pump cover can also matter. Turn power off and use only the exact E-Nr manual for removal, cleaning, and reinstallation. The cover must seat as the manual specifies. Stop if sharp debris is visible, access differs from the manual, or the cover cannot be secured. Service must confirm the accessible route is actually clear and the cover remains sealed during operation.
  • Visible drain hose: A kink, sharp bend, or pinched hose can reduce useful flow even when the pump can be heard. Inspect only the portion visible without moving the built-in dishwasher. A technician or plumber should verify hidden routing, high-loop/connection geometry, and unrestricted flow; do not disconnect an inaccessible hose as an owner test.
  • Air gap and sink/disposer connection: Bosch's current index includes the air gap and drain connection in E24 checks. Visible backup at the air gap, a slow sink, or an obstruction at the connection points toward external backpressure rather than an automatic pump failure. Clean only an owner-accessible air-gap cap if its instructions allow it. Plumbing disconnection belongs to someone who can contain hot residual water and restore a leak-free connection.
  • New garbage disposer knockout plug: Bosch specifically tells owners to confirm that the dishwasher drain-port plug was removed when the hose is connected to a disposer. If E24 started immediately after a new disposer or sink installation, this after-event clue belongs ahead of dishwasher parts. The installer or plumber should correct an inaccessible connection.
  • Drain performance, command, or sensing after the route is clear: A hum with no water movement or partial drainage followed by E24 does not prove useful pump flow. Record the sound, remaining water, and when the code returns. If the filter, cover, visible hose, air gap, and disposer/sink connection are correctly handled yet E24 returns, diagnosis must separate pump movement from useful flow, external backpressure from an internal restriction, and a correct command from a control/sensing problem. The code alone cannot select the pump or control.

What a Clean Filter Rules Out — and What It Does Not

Cleaning a dirty filter proves only that the debris you removed is no longer in that location. It does not prove:

  • the pump cover is seated and sealed correctly;
  • the pump area contains no inaccessible obstruction;
  • the drain hose is open through its full run;
  • the air gap, disposer port, or sink connection accepts flow;
  • the pump produces the required flow under load;
  • the control commanded and interpreted the drain event correctly.

If E24 appears immediately after filter or pump-cover cleaning, recheck the exact manual's seating steps with power off. A mis-seated cover or filter can be a new post-cleaning condition. Do not repeat disassembly when access or debris is unsafe.

A Note About Bosch's Current E24 Wording

The current Bosch US exact E24 page and the broader dishwasher error-code index are not worded identically. Both place the problem in drainage and identify the filter/pump-cover and external connection areas. The detailed index coherently names the drain pump hose and air gap; the exact E24 page contains one “inlet hose” line among drain-specific steps.

Because an inlet hose is not the drain route, do not use that isolated line as an instruction to disconnect water supply plumbing. Use the current error index and the exact E-Nr manual for the actual drain-hose procedure. This is also why the full model identifier matters more than a copied checklist.

Safe E24 Checks

  • Photograph the code: Capture E24, E-24, or the entire newer-format display exactly.
  • Photograph the E-Nr and serial: Include every suffix so the correct access diagram and code format can be used.
  • Turn power off before internal owner access: Use a dry, safely accessible control, plug, or breaker. Do not reach into standing water near electrical parts.
  • Follow the exact filter/pump-cover procedure: Remove only what the model manual identifies as owner-accessible. Watch for sharp debris and secure the cover/filter exactly as shown.
  • Inspect visible hose routing: Look for pinching or a sharp bend without pulling the dishwasher.
  • Inspect an accessible air gap: Note visible backup or debris; do not disconnect plumbing if containment and safe access are not established.
  • Record recent work: A new disposer, sink, air-gap, countertop, or dishwasher installation can change the external route.
  • Record the drain result: Note whether water moves, where it backs up, the sound, the remaining water, and when the code returns.

Reset Only After the Drain Condition Is Corrected

Bosch's E24 guidance places reset after the listed drain checks. The current US general procedure uses “Reset 4 Sec.” or the Start button for about four seconds on applicable controls, followed by a roughly one-minute cancel-and-drain sequence. The exact button wording varies.

One manual-authorized reset can confirm the result after a real obstruction or connection problem has been corrected. Repeated reset/start timing tricks do not prove flow, can erase the useful code timing, and should stop when E24 returns.

What Not to Do

  • Do not reach blindly into the pump area: Sharp debris and model-specific cover designs make that unsafe.
  • Do not pull the built-in dishwasher or disconnect hidden hoses: Water, drain, power, and mounting connections need planned access.
  • Do not run a drain hose into a bucket as an improvised built-in test: Residual water may be hot, containment can fail, and the connection must be restored leak-free.
  • Do not replace the drain pump from E24 alone: Pump sound, movement, flow, command, and external backpressure are different facts.
  • Do not use chemical drain cleaner in the dishwasher: It can damage appliance materials and create a service hazard.

When to Stop Using the Dishwasher

Stop immediately for leaking water, water near electrical parts, a burning/electrical odor, a repeated breaker trip, sharp debris that cannot be removed safely, a pump cover that will not secure, or an air gap/sink connection that spills during draining. If water is actively escaping, close the dishwasher water shutoff when safely accessible.

How E24 Differs From Nearby Bosch Codes

  • E23 and E6101: Bosch uses drain-pump issue wording and directs service on the current US index.
  • E25, E6102, E6103, and E9240: Bosch's current owner checks overlap with parts of the E24 drain route, but that does not make the codes interchangeable on every E-Nr.
  • E15 and E3100: Water-in-base leakage-protection family; turn off water and stop.
  • E16, E17, E18, and E3200: Inlet/fill-flow family, not the E24 drain result.

Always preserve the exact displayed format. An E-Nr manual has priority over a generic list when the model's wording or access differs.

What Diagnosis Must Prove

A complete E24 diagnosis should separate:

  • Internal accessible restriction: Filter and pump-cover area are clear, correctly seated, and not leaking or admitting debris.
  • External restriction/backpressure: Drain hose, air gap, disposer port, sink connection, and installation routing accept the required flow.
  • Pump performance: The pump moves and produces useful flow under the actual restriction/load, not merely sound.
  • Control command: The pump is commanded at the correct program step and receives the correct supply.
  • Result sensing: The exact control interprets water removal correctly and no model-specific fault changes the code meaning.

The repair is closed only when the corrected route completes the relevant drain events without E24 returning or water leaking.

Before Service

  • Send the E24 and E-Nr photos: Include the complete display and identifier suffix.
  • Describe standing water: State depth/location after the code and whether the water is clean or soiled without reaching into it.
  • Record the drain sound and duration: Note silence, hum, normal pump sound, gurgling, or partial discharge.
  • Report external behavior: Note air-gap overflow, slow sink/disposer drainage, or a recent disposer/sink installation.
  • List checks already completed: Say exactly which owner-accessible filter/cover steps were done and whether the code appeared before or after them.
  • Send a short video only from safe access: Show the display, air gap, or visible connection; do not remove panels for filming.

FAQ

Should I call a plumber or an appliance technician for E24?

Use a plumber or installer when the air gap backs up, the sink/disposer drains slowly, or E24 began immediately after disposer or sink work. Use an appliance technician when the external connection accepts water normally but E24 returns after the exact-manual filter and pump-cover checks. If both sides are uncertain, preserve the code and external behavior so the first visit can assign the restriction without guessing a pump.