Bosch Dishwasher E15 Error: How to Fix It in 5 Minutes

Your Bosch dishwasher is flashing E15 (sometimes called E:15 or just E15) and refuses to start a new cycle. There is no visible flood in your kitchen, no obvious leak, but the unit is locked. This is one of Bosch's most common error codes and almost always has the same cause: a tiny amount of water reached the base pan and tripped the Aquastop float switch. Siemens and Neff dishwashers come from the same maker and use the same code, so everything below applies to them too.

Before doing anything else, look at the floor under and in front of the dishwasher. If you see standing water, you have an active leak and the order matters: stop the leak first, then clear the error. If the floor is dry, the water in the pan is likely from a small splash or condensation, and the fix below clears it in five minutes. If the display shows E22 or E24 instead, the water is standing inside the tub, not under it: Bosch E22 means a blocked filter and Bosch E24 a blocked drain.

Start With These 30-Second Checks

1. 1Look at the floor in front of and under the dishwasher with a flashlight. Wet means active leak.
2. 2Open the door and check whether the bottom of the tub is wet - dripping from above the tub is different from water in the base pan below it.
3. 3Make sure no recent activity could have caused a splash: dishwasher pod broke open, salt cap left loose, kitchen flood reaching the dishwasher feet.

How to Reset a Bosch E15 Error (the Tilt Is the Reset)

There is no hidden reset button for E15. The code clears itself the moment the float switch in the base pan drops back down, and the only way to make that happen is to get the water out from under the machine. Holding Start for three seconds cancels a cycle but does not clear E15 while the pan is still wet. This is the whole procedure:

1. 1Cut the power: unplug the dishwasher, or switch off its breaker if it is hardwired with no plug, as many US dishwashers are. The off button on the door panel is not enough, because you are about to move the machine.
2. 2Close the water valve under the sink. Open the door, remove the two screws that fix the frame to the countertop or side cabinets, and ease the machine forward until its top clears the counter, without stretching the hoses or the cable. Lay towels in front of and behind it.
3. 3With a second person, tilt the dishwasher backwards 30 to 45 degrees and hold it for about 60 seconds. You will usually hear water run out of the base pan onto the floor behind it.
4. 4Set it back down, dry the floor, push it back under the counter and refit the two screws so it cannot tip forward with the door open. Open the water valve again. With your hands clear, plug it back in or switch the breaker on and press On. If the pan is dry the display shows a normal cycle instead of E15.
5. 5Start a short rinse cycle and watch the display for the first two minutes. If E15 returns straight away, the pan is filling again and one of the leaks in the sections below is still open.

1. Tilt the Dishwasher to Drain the Pan

This is the fix that clears most E15 codes. The base pan holds maybe a cup of water. Tipping the unit lets that water drain out the back, the float drops, and the Aquastop resets.

The steps are the ones in the reset section above: power off, water valve closed, screws out, the machine eased forward, a 60-second tilt with a helper, then everything back in reverse order. If E15 returns after a clean tilt, water is still reaching the pan, and the next sections find where.

2. Find the Source of the Leak

If the E15 returns within a few cycles, water is still reaching the pan. You need to find where it is coming from before another tilt will help.

1. 1Remove the two mounting screws and ease the dishwasher out from under the counter, carefully: the water and power lines are still connected, so do not stretch them.
2. 2Run a short cycle and watch the bottom edges, the water inlet hose and the drain hose for any drip. Look along the underside of the tub with a flashlight too, and keep your hands out while it runs: a hairline crack from years of heat cycling sometimes leaks only when full.
3. 3Push the machine back and refit the two screws before you open the door mid-cycle to check the gasket: pulled out and loose, it tips forward when the door opens. Look for a torn or pinched section and for water on the outer door panel.
4. 4Inspect the salt cap and rinse aid cap for proper sealing - a loose cap drips inside the door over time.
5. 5To feel for damp spots under the tub, stop the cycle and cut the power first: unplug it or switch off its breaker, then take the two screws out and pull it out again.

3. Replace the Door Seal If It Is Cracked or Pinched

The door gasket is rubber, and rubber often hardens after 8 to 10 years. A bad gasket lets water spray out during heavy cycles, which trickles down the front and pools under the unit.

1. 1Open the door and look at the entire gasket - run a fingertip along it.
2. 2Check for tears, hardened sections, gaps where it meets the corner, or food residue baked into a fold.
3. 3Clean it first with warm soapy water and a soft brush. A dirty gasket can fail to seal even when intact.
4. 4If it is hard, brittle, or torn, order the replacement by your model number from the Bosch parts site (around $40 for most models).
5. 5Replacement just pulls out and snaps in, no tools needed, takes 5 minutes.

4. Tighten or Replace the Water Inlet Hose

On US models a supply line runs from the valve under the sink to an elbow fitting on the machine; European models use an Aquastop hose with a valve at the tap. If either connection loosens over time, water drips during fill and runs down to the pan.

1. 1Cut the power (unplug it or switch off its breaker), then shut off the water supply valve under the sink, the small valve on the hot water line going to the dishwasher.
2. 2Disconnect the inlet hose from the wall valve and from the unit.
3. 3Inspect both ends for cracks in the rubber washers or visible mineral buildup.
4. 4Replace the rubber washers (about 50 cents each at any hardware store) before reconnecting.
5. 5Hand-tighten plus a quarter turn with a wrench - over-tightening crushes the washer and creates a slow leak.

5. Check the Salt and Rinse Aid Caps

European-style Bosch units have a salt reservoir in the base of the tub. If the salt cap is not screwed down fully, water leaks into the salt compartment, then into the base pan.

1. 1Pull out the lower rack and find the salt cap (large round cap, usually green or blue, in the floor of the tub).
2. 2Unscrew it fully - the seal is an O-ring inside the cap.
3. 3Check the O-ring for cracks or food debris.
4. 4Replace the O-ring if damaged - any appliance parts site sells the matching one for under $5.
5. 5Fill the salt reservoir if empty (use only dishwasher salt, never table salt), then screw the cap back hand-tight plus a small turn.

6. When to Call a Pro

If you have tilted the unit, replaced the gasket, checked all hoses, and E15 still returns, the issue is deeper - usually a stress crack in the inner tub liner, a failed Aquastop solenoid, or a control board that no longer reads the float correctly. These need a qualified Bosch tech.

1. 1If it is under a year old, call Bosch: the standard US warranty covers the whole machine for the first year, with longer limited cover on some parts.
2. 2If over 10 years old, the repair often costs more than a new entry-level unit. Get a quote first.
3. 3Ask the tech whether the float switch tested OK before it gets replaced.
4. 4Document the error history (date, what you tried, when it returned) so the tech does not start from scratch.

Tools You Will Probably Need