Dishwasher Guide
Bosch Dishwasher E15 Error: What It Means & How to Fix It
E15 on a Bosch dishwasher isn't a drain fault and it isn't a sensor glitch. A float switch in the base pan under the tub has found water where there should be none, and the dishwasher has shut off its own water supply to stop a flood. Bosch's wording is that the leakage protection system has activated.
That's good news for your kitchen floor and slightly worse news for you, because the code won't clear until the base is dry. And if water keeps arriving, something is leaking.
Why the code appears
- A door gasket that's torn, warped, or coated in grease so it no longer seals. Repair shops cite this as the single most common source.
- A weeping sump seal or pump seal under the tub. Bosch issued a sump seal repair kit (part 12005744) for exactly this on some models.
- A loose hose clamp or a slow drip at a fitting inside the unit.
- A cracked or stuck-open water inlet valve that keeps trickling after the fill should have stopped.
- A cracked or blocked spray arm throwing water at the door instead of the dishes.
- Too much detergent, or the wrong kind. A sudsy overflow can trip the float once without any real leak.
- Debris wedged in the sump. One owner traced a repeat E15 to a shard of teacup and a metal label lodged in the sump area; removing them cleared the code.
How to clear it safely
Switch the dishwasher off at the breaker and close the supply valve under the sink. Pull the unit forward, lay towels down, and tilt it back 30 to 45 degrees so the base pan drains. Let it dry completely (some owners leave the door open overnight). Then restore power and run a short cycle.
If that's all it takes and the code doesn't come back, you probably had a one-off overflow. If E15 returns within a few cycles, there's an active leak. Bosch's official advice at that point is to turn off the water inflow and book service rather than keep resetting it.
What a technician checks
We take the kick plate and base plate off, dry the pan, then run water through the machine and watch. Where and when the drip starts tells us most of what we need. A leak during fill points at the inlet valve or fill hose. During wash, at the door seal, spray arms, or the circulation pump and sump seals. During drain, at the pump housing or drain hose. From there it's a seal, clamp, valve, or gasket replacement, then a full cycle to confirm the pan stays dry.
Don't ignore a repeating E15
The float is protecting the electronics and your cabinets. Draining the pan and restarting again and again without fixing the source means water sitting against wiring and the control board, and eventually a wet subfloor. A door gasket or hose clamp is a cheap fix. A swollen cabinet floor is not.
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