Bosch Dishwasher E15: Fix the Leak Detection Error

Quick Answer

The E15 code means water has leaked into the bottom tray of the dishwasher and triggered the flood switch. To fix it, you must disconnect power, drain the water from the base pan, and identify the source of the leak to prevent it from happening again.

E15 is honestly the most common call I get on Bosch dishwashers. There's a little foam float sitting in the base pan, and when water gets in there it floats up and hits a microswitch, which sends the machine into emergency drain mode. Ignore it and you risk water damage to your subfloor, your cabinets, the motor. Find the actual leak source or you're just going to be dealing with this again in two weeks.

BoschDishwasherSeverity: highDifficulty: intermediate95% DIY Success

Time to Fix

30–60 min

Difficulty

intermediate

Parts Cost

—

Tools Needed

Torx T20 screwdriver bit, Phillips #2 screwdriver

What Does the E15 Code Mean?

OK so here's the deal. Nine times out of ten it's a leaking sump seal or water hitting the door seal at a weird angle. The board sees that float switch trigger and locks everything down except the drain pump. You can't punch in a reset code to clear this one. The switch has to physically drop back down on its own, which means you've got to get that base pan bone dry first.

Most Likely Causes

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

Sump seal leak40%

Oversudsing or too much detergent25%

Loose spray arm or spray arm hitting rack20%

Leaking water inlet valve15%

Symptoms You May Notice

The drain pump won't stop running, even with the door hanging open and nothing on the panel responding, and there's no button you can push to make it quit.
Machine won't start a new cycle at all, just sits there with the pump humming.
E15 is sitting on the display and nothing you do clears it.
There's a tap or faucet icon flashing on the control panel alongside the error code.
You can feel moisture on the floor under the front of the dishwasher, or the base cabinet next to it feels damp.

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

There's no button combination for E15. Once the base pan is completely dry, the float switch drops on its own and the code clears automatically. Unplug the unit for 5 minutes after drying everything out, then plug it back in and run a short rinse cycle while you watch for any new leaks. If the code comes back within a cycle or two, you haven't found the actual leak source yet and you need to go back to step five.

Tools Required for Diagnosis

Torx T20 screwdriver bitPhillips #2 screwdriverFlat-head screwdriverShop vacuum with narrow nozzle attachmentFlashlight or headlampHair dryerSponge or old towelsSmall inspection mirror

Diagnostic Checklist

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

Frequently Asked Questions

Why is my drain pump running even with the door open?

That's the Bosch flood protection doing exactly what it was designed to do. When that float switch trips, the control board goes into a kind of panic mode and keeps the drain pump running continuously, even with the door open, because it thinks there's an active leak happening right now. It's trying to prevent water from building up further and damaging your floor. The only way to stop it is to get the water out of the base pan and let that float switch drop back down on its own. You can't override it from the control panel. There's no shortcut here.

Can I fix the E15 code by tilting the machine?

Yeah, tilting the machine back about 45 degrees will let the water in the base pan drain out through the float housing, and the code will clear. Honestly I've done it in a pinch when I needed to get a machine running fast. But here's the thing, if you don't find the actual leak, water's just going to collect in the base pan again next time you run a cycle, maybe the one after that. Then you're right back to E15. Fix the root cause or you're just delaying the problem by one load of dishes.

What are the most common leak points on a Bosch dishwasher?

The sump seal is where I look first every single time. It's a rubber gasket where the pump housing meets the bottom of the tub, and the screws holding it can slowly back themselves out from years of vibration. Half the time, a quarter turn clockwise on those screws is all it takes to stop the leak. After that I check the door gasket, especially the bottom corners where it tends to fold and crack. Cracked spray arms are third on my list. I replaced three of those last month alone on the 500 series machines.

Is it safe to use the dishwasher while E15 is displayed?

The machine won't actually let you run a cycle, so you don't really have a choice. It's fully locked out. But don't try to trick it or bypass the safety in any way. If there's water sitting in that base pan and you somehow forced a cycle, you'd be running the machine with live electrical components sitting in a wet environment. Not good. Long term, ignoring the underlying leak leads to motor shorts, mold growing under the unit, and water-damaged cabinet flooring that costs way more to fix than the dishwasher itself.

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

Almost never. In 15 years I think I've replaced maybe two control boards where E15 was actually a board problem, and both of those machines had a bunch of other weird symptoms going on too. The board is doing its job perfectly fine, it's reading a triggered float switch and responding the way it's supposed to. The problem is mechanical, water where it shouldn't be. Don't spend $200 to $400 on a new board until you've confirmed the base pan is completely dry and tracked down the actual leak. Nine out of ten times you're looking at a $15 to $20 sump seal.

Models Known to Experience E15 Errors

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

SHPM88Z75N, SHPM65Z55N, SHEM63W55N, SHP865ZD5N, SHPK7FP55N, SHPM98W75N, SHEM3AY55N, SHPM78Z55N

Written by

Mike Sullivan

Lead Appliance Repair Technician · 20 years experience

Last verified for technical accuracy on March 17, 2026