Bosch Dishwasher E15 Error Code: Causes & Fixes

E15 means the Bosch AquaStop anti-flood system has detected water in the base pan. Under the tub sits a shallow tray with a foam float resting on a small switch. Any water that escapes the tub, its pumps or its hoses runs down into that tray; when enough collects to lift the float, the switch tells the control board, which stops the cycle, shuts off the inlet and runs the drain pump to empty the tub. That is why an E15 dishwasher usually keeps running the drain pump and won't start a cycle. The code does not say where the water came from, only that it is there — the job is to dry the base and then find out whether it was a one-off or a leak. Depending on the display it is written E15 or E:15.

If the reset didn't clear E15

A technician can come out and diagnose it, the same day when a window is open — $69 diagnostic, applied to the repair.

Call (754) 888-5560 · Book a visit online

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Which Bosch models show E15

Bosch fits AquaStop leak protection across its US dishwasher range, from the 100 Series to the Benchmark, and the code works the same way on all of them. On many models the inlet hose is a double-walled AquaStop hose with its own valve at the supply end, a second layer of protection that cuts the water if the inner hose leaks. That hose is part of what a technician checks when E15 keeps returning, because a leak inside its outer sleeve can drain down into the base pan without ever reaching the kitchen floor.

Common causes

Too much foam

Hand dish soap in the dispenser, a spilled bottle of rinse aid, or a double dose of detergent makes foam that pushes out past the door seal and down into the base. Rule this out first because it is free: the machine is sound, the water simply escaped as suds.

Water in the base pan

A small spill, condensation, or a minor leak collects in the base and trips the float switch. Moving the dishwasher, or water poured in while cleaning the tub, can reach the base the same way.

Leaking door or tub seal

A worn door gasket or tub seal lets water drip into the base over time. Food debris trapped against the lower edge of the gasket does the same thing on a gasket that is otherwise fine.

Loose hose or pump seal inside

A loose inlet or drain connection inside the unit drips into the base, and the circulation and drain pumps have seals that harden with age. These are slow leaks that never reach the kitchen floor, because AquaStop catches them first.

Stuck float switch

Once tripped, the float may stay up even after the base is dry, especially if it sits in a film of detergent residue.

What you can safely try

  1. Switch off power and water first. Turn the dishwasher off at the breaker or unplug it, and close the supply valve under the sink, before you tilt or open anything.
  2. Check for suds. Open the door. If the tub is full of foam, scoop it out, wipe the door edge, and use only dishwasher detergent from now on. Foam alone is often the whole story.
  3. Drain the base. Tip the dishwasher backward ~45° for 30 seconds to drain water from the base pan, then stand it upright. On a built-in unit that means releasing the mounting screws under the counter and easing it out with the hoses attached; stop if a hose pulls tight.
  4. Dry the pan. Soak up any remaining water with a towel through the base/kickplate, then run a short cycle. If the base was very wet, leave it a day to dry so the float can drop back on its own.
  5. Check for obvious leaks. Inspect the door gasket and visible hose connections for drips, and after the next cycle look along the lower edge of the door and under the front of the cabinet.

When to call a professional

If E15 returns after draining the base and suds are ruled out, there's an active leak (door seal, tub, a hose or a pump seal) that needs to be located and repaired. Finding it means pulling the dishwasher out, removing the kick plate and side panels, and watching the base while the machine runs, with water and power both live in that space — a technician's job. Do not tape or wedge the float down to keep the dishwasher running: AquaStop is the only thing between that leak and your cabinet floor. We service Bosch dishwashers across Miami-Dade & Broward — call (754) 888-5560.

What the technician tests

  1. Running with the panels off. The technician removes the kick plate and, where needed, the side panels, then runs a cycle with a light under the tub to watch where water first appears.
  2. Float and switch. With the base dry, the float's movement is checked and the switch tested, so a stuck float is not mistaken for a live leak.
  3. Pump seals and hose clips. The circulation and drain pumps, their seals and every clip under the tub are checked for weeping under pressure.
  4. AquaStop hose. The double-walled supply hose and its valve are checked for a leak inside the outer sleeve, which drains into the base by design.

What it costs

If you fix it yourself: $0.

With a technician: A fixed price after diagnosis, agreed before any work starts; the diagnostic fee is applied to the repair when you approve it.

Frequently asked questions

What does E15 mean on a Bosch dishwasher?

E15 means the AquaStop anti-flood system detected water in the base pan and tripped a safety float, stopping the dishwasher to prevent flooding.

How do I clear a Bosch E15 error?

Tip the dishwasher back about 45° to drain the base, dry the pan, and run a cycle. If E15 returns, there's an active leak that needs professional repair.

Will E15 fix itself?

If it was a one-time spill or condensation, draining and drying the base clears it. A recurring E15 means a real leak that won't resolve on its own.

Does E15 show the same way on every Bosch dishwasher?

The condition is the same on every Bosch with AquaStop: water in the base pan. How it is shown depends on the control panel. Models with a numeric display show E15 or E:15; models without one signal it with a pattern of flashing lights listed in the owner's manual. In every case the drain pump running with no cycle started is the giveaway.

Can I keep using the dishwasher with E15?

Not until the base is dry — the machine will not start while the float is up, by design. If the code clears and later returns, run the dishwasher only when someone is home, and check the floor in front of it after each cycle until the leak is found.

Related codes: Samsung SE / 5E, Bosch E24.

The problem behind this code