E15 on a Bosch dishwasher means water collected in the base pan and tripped the Aquastop leak-protection float — the dishwasher shut itself off to prevent a flood, and it often runs the drain pump nonstop until the base is dry. It's a smart safety feature, and sometimes it clears with a simple reset, but it's usually telling you water got somewhere it shouldn't. Here's what a tech does.
A one-time overfill, a heavy suds event, or a small splash can trip the float. Often the fix is just drying the base so the float drops back down.
Check it: Tip the dishwasher back gently (or prop the front up) to drain water out of the base pan, let it dry, and set it upright. Then run a short cycle — if E15 is gone and doesn't return, it was a one-time trip.
Too much detergent or the wrong kind creates suds that overflow into the base and trip the float.
Check it: Use the correct dishwasher detergent and amount; run a rinse cycle to clear existing suds after drying the base.
If E15 comes right back after drying the base, water is actively leaking in — from a hose connection, the pump seal, the spray arm supply, or a tub crack.
Check it: This is the tech diagnosis — finding and fixing the leak source is what clears E15 for good.
The Aquastop float itself can stick up (from debris) and report water that isn't there.
Check it: After drying the base, make sure the small foam float in the base moves freely; a stuck float is a tech fix.
Repair — a reset is free, and even a leak fix (a hose, a seal) is far below the cost of a new dishwasher. The important thing is not to ignore a returning E15, since it means water is getting loose.
In Middle Tennessee or the Baton Rouge area? We'll come to you, same-day. Anywhere else in the U.S.? Send a 10-second video, a real technician tells you exactly what's wrong for $50 (credited toward the repair), and we ship you the exact part. 24/7 — text, call, or upload anytime.
Tip the dishwasher back to drain water out of the base pan and let it dry so the Aquastop float drops, then set it upright and run a short cycle. If E15 is gone, it was a one-time trip. If it returns, there's an active leak to find.
A returning E15 means water is actively leaking into the base — a hose, pump seal, spray-arm supply, or tub. That needs a tech to locate and fix the leak; drying the base only resets it temporarily.
Often free (a reset after drying the base) or an affordable hose/seal if there's a leak. Your $50 Quick Check credits toward the repair if a part is needed.