Bosch Dishwasher E15 — What It Means & How to Fix It
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.
What this code means
E15 is the most famous Bosch dishwasher code: the float switch in the base pan detected water and the anti-leak system took over, typically running the drain pump and refusing normal cycles (often with a tap symbol lit). The water can come from a real leak — a hose, seal, or overfoaming — or from something as mundane as a heavy spill during loading or a recent move.
E15 behavior is consistent across Bosch's range and its AquaStop-equipped models. The official Bosch self-help pages cover it directly — worth bookmarking since this code generates more searches than any other Bosch fault.
Most likely causes
| Cause | How likely | DIY-fixable? |
|---|---|---|
| Moisture in the base pan without an active leak (spill, move, condensation) | Very common | Yes — dry out |
| Oversudsing forcing foam-water into the base | Common | Yes — detergent check |
| Loose hose connection or worn door seal | Common | Partly — visible checks |
| Internal leak: sump gasket, pump housing, or hose | Less common | No — technician job |
What you can try yourself
- Cut power at the socket or breaker — that silences a drain pump running nonstop — and close the supply valve under the sink.
- Check the floor around and under the front of the unit: a dry floor with E15 showing usually means old or minor moisture on the float, not an active leak.
- Think back over the last day: heavy detergent, hand soap by mistake, a big spill while loading, or the unit being tilted all put water in the base without anything being broken.
- Leave the machine powered off for several hours (overnight is better) with the door ajar so the base pan can evaporate dry. Many E15s clear themselves exactly this way.
- Restore power and run a short cycle, staying nearby and checking underneath for fresh water. If the code returns after a full dry-out, the leak is real — keep the supply valve closed and book service.
Seeing the symptom rather than the code? Dishwasher leak alarm: checks that apply across brands.
When to call a technician
- Fresh water appears under the unit during the test cycle — an internal hose, seal, or the sump gasket has failed.
- E15 returns after every complete dry-out with no suds or spill in the story.
- The drain pump keeps waking up on its own over several days, meaning the float keeps finding new water.
Typical professional repair cost: A diagnostic visit runs $75–$150; internal hose or seal repairs commonly total $150–$350.
Frequently asked questions
Some guides say to tilt the Bosch forward 45 degrees to clear E15 — should I?
It works because it pours the base pan water out, but a plumbed-in unit has live water and drain connections and real weight. If you go that route, disconnect power first, close the supply valve, and use a helper. The patient version — power off, door open, let it dry overnight — achieves the same reset without wrestling the machine.
Why does the tap symbol light up with E15?
Bosch uses the tap indicator for water-path problems generally. Combined with E15 it's telling you the anti-leak system is active and the machine won't run normal cycles until the base pan reads dry.
Is E15 covered by the AquaStop guarantee?
AquaStop refers to Bosch's supply-hose protection system, and Bosch has historically offered guarantees around AquaStop failures specifically. E15 itself is the detection system working as designed — whether any repair is covered depends on what actually leaked and your model's warranty terms.
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 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.
- Bosch Dishwasher E14 The flow meter that counts water into the machine stopped making sense, so filling can't be trusted — a reset and supply check first, then it's a sensor-level repair.
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