Bosch Dishwasher E23 — What It Means & How to Fix It
E23 means there is an issue with the drain pump — Bosch says it happens when the pump is blocked, clogged or faulty, and directs owners to its customer support.
What this code means
Bosch's US error-code page describes E23 as an issue with the drain pump: it happens when the drain pump is blocked, clogged or faulty. Unlike E24 and E25, where Bosch walks owners through clearing the pump cover, its guidance for E23 is to contact Bosch Customer Support.
Bosch's US error-code page lists E23 as a drain pump issue. If your display shows E24 or E25 instead, those are the drain codes Bosch gives owner steps for — see those guides.
Most likely causes
| Cause | How likely | DIY-fixable? |
|---|---|---|
| Drain pump blocked or clogged with debris | Common | Partly — clean the filter and pump cover area |
| Drain pump faulty | Common | No — technician job |
| Pump wiring or control fault | Less common | No — technician job |
What you can try yourself
- Switch the dishwasher off and remove any standing water from the base of the tub.
- Remove and rinse the filter, then check the area beneath it for debris.
- Refit the filter and run a short cycle.
- If E23 returns, contact Bosch Customer Support as Bosch advises.
When to call a technician
- E23 returns after the filter and pump area have been cleaned.
- Water is left standing in the tub after every cycle.
- The pump hums or makes no sound at all when the dishwasher should be draining.
Typical professional repair cost: Drain pump replacement on a Bosch dishwasher typically runs $150–$300 including labor.
Frequently asked questions
What does E23 mean on a Bosch dishwasher?
Bosch describes it as an issue with the drain pump — the pump is blocked, clogged or faulty — and directs owners to its customer support.
How is E23 different from E24 and E25?
All three are on the drain side. For E24 and E25 Bosch gives owner steps for clearing the pump cover; for E23 it goes straight to contacting customer support.
Sources checked
Error meanings can vary by model. This guide was checked against the documentation above; use the manual for the model number on your own appliance when it differs.
Related Bosch codes
- Bosch Dishwasher E15 Water reached the base pan under the tub and Bosch's leak protection locked the machine — sometimes a genuine leak, often a one-off spill or condensation that clears once the base dries.
- Bosch Dishwasher E24 The dishwasher can't drain properly — start with the filter, then the drain hose path, and don't skip checking that the drain pump cover is seated.
- Bosch Dishwasher E25 The drain pump itself is blocked or its cover is loose — and Bosch makes the pump cover owner-accessible, so this is one of the most fixable codes the brand throws.
- Bosch Dishwasher E09 The heating system isn't raising the water temperature — beyond one reset, the flow-through heater is a mains-voltage part that belongs to a technician.
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