Bosch Dishwasher E15 Error Code: Flood Sensor Fix

Quick Answer

The E15 code means water has leaked into the hidden drip tray beneath the wash chamber. You can often clear the code by tilting the dishwasher forward 45 degrees to drain the water, but you must identify and repair the actual leak source to keep the error from returning.

Honestly, E15 is probably the call I get more than any other Bosch issue. Your machine's got a hidden drip tray under the bottom, and something's been leaking into it. Ignore this one and you're risking water damage to your subfloor and cabinet. The tilt trick clears the code fast, but you've got to find the actual leak or it'll keep coming back.

BoschDishwasherSeverity: highDifficulty: intermediate92% DIY Success

Time to Fix

30–90 min

Difficulty

intermediate

Parts Cost

—

Tools Needed

Torx T20 screwdriver, Phillips #2 screwdriver

What Does the E15 Code Mean?

Here's the deal with E15. Bosch built a little plastic pan under your dishwasher specifically to catch leaks before they become a flood. Once there's water in that pan, a foam float pops up, the machine shuts down, and the drain pump just runs and runs. The good news? It's usually a pretty cheap fix. The bad news? You've got a real leak somewhere and you need to find it.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Sump gasket failure60%

Oversudsing or user error15%

Water inlet valve leak10%

Hose or clamp failure10%

Faulty float switch5%

Symptoms You May Notice

E15 is locked on the display and nothing you press changes it. Start, cancel, doesn't matter, the machine just won't respond.
The drain pump is running nonstop even with the door wide open. It's a high-pitched whine or hum that won't quit.
There's a wet spot or actual puddle on the floor underneath the front of the machine.
The water tap symbol on the panel is lit up solid or flashing.
You nudge the front of the machine and you can hear or feel water sloshing around inside the base.

Can you reset a Bosch dishwasher to clear the E15 code?

There's no button combo to clear E15. It's a physical safety switch, not a software glitch. Once you drain the base pan completely, the foam float drops on its own and the code clears automatically on the next power-up. You don't need to do anything else. Just get that pan completely dry first, or the float'll trip again immediately.

Tools Required for Diagnosis

Torx T20 screwdriverPhillips #2 screwdriverLarge towels or old bath matSpongeFlashlightWet-dry shop vacuumWork gloves

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

Frequently Asked Questions

Why does my Bosch dishwasher pump keep running even when I turn it off?

That's the E15 safety mode doing exactly what it's designed to do. The machine thinks it's actively flooding, so it keeps the drain pump on no matter what. Doesn't matter if you hit cancel, open the door, or hold buttons for 10 seconds, it'll keep running. The only fix is to physically remove the water from the base pan and let the float switch drop. Fastest way is to tilt the machine forward and let gravity drain it out onto some towels. Once that float drops, the pump shuts off on its own.

Can I fix an E15 error without pulling the dishwasher out?

Sometimes, yeah. If the leak was a one-time foam incident from bad detergent, you might be able to pull the bottom filter basket out, reach in with a sponge, and soak up enough moisture that the float resets. Worth trying first since it's easy. But if the water got all the way down into the hidden chassis pan underneath the machine, you can't reach it from inside the tub. You've got to tilt the whole thing forward. Don't expect the sponge trick to work if there's a real gasket or plumbing leak involved.

What is the most common cause of the Bosch E15 code?

A worn-out sump gasket, hands down. Six out of ten service calls I get for this code, that's what I'm looking at. That rubber seal between the wash tub and the pump housing takes a beating, especially in hard water areas where mineral deposits basically sandpaper it from the inside over years of heat cycles. The good news is Bosch makes a repair kit specifically for this, runs about 15 to 25 bucks, and it's a manageable DIY repair. Search your model number plus 'sump seal repair kit' and you'll find the right part.

Does the E15 error mean I need a new control board?

Almost never. I can't tell you how many times I've seen someone spend 200 dollars on a new board when the actual problem was a 15-dollar gasket. The control board is just reading the float switch and responding correctly. That's not a malfunction, that's the board doing its job. Don't replace it. The only time I'd even start to suspect the board is if E15 shows up when the base pan is completely bone dry and the float switch itself tests fine when you check it manually.

Can using too much soap cause an E15 error?

Yep, and it trips people up all the time. Regular dish soap is the biggest culprit. One squirt of Dawn in a dishwasher generates enough suds to fill the entire interior. That foam pushes down through every gap and drips right into the base pan, tripping the float sensor even though there's no actual plumbing leak. I had a call last month where a homeowner had been using dish soap for three weeks because they ran out of pods. E15 every single cycle. Switched back to actual dishwasher detergent, tilted the machine once to drain it, never came back.

How long does the E15 repair usually take?

If it's just a foam-related false alarm, you can be done in 20 minutes. Tilt it, drain it, let it dry, done. If you've got an actual gasket leak, budget about an hour total, including pulling the machine out, finding the leak, installing the sump kit, and running a test cycle. The sump gasket repair itself once you've got the kit in hand is maybe 20 minutes of actual work. It's not a scary repair if you're reasonably handy with basic tools.

Models Known to Experience E15 Errors

This repair applies to most Bosch dishwashers with this error code. Common model numbers include:

SHPM88Z75N, SHPM65Z55N, SHE53B75UC, SHX878ZD5N, SHEM3AY55N, SGE53C55UC, SHE65T55UC, SHPM78Z55N

Written by

Mike Sullivan

Lead Appliance Repair Technician · 20 years experience

Last verified for technical accuracy on March 17, 2026