Bosch Dishwasher Error E15: What It Means & How to Fix It
Quick answer: E15 on a Bosch dishwasher means the float switch in the base of the unit has detected water where it shouldn’t be — the machine stops immediately to prevent further leaking, regardless of how minor the leak is.
“Noticed water pooling near the dishwasher and E15 on the display. Igor traced it to a cracked spray arm dripping onto the base pan, replaced it and ran a full cycle to confirm before leaving.”
Quick Answer
Bosch dishwashers use a float switch sitting in the base pan beneath the tub, designed to be sensitive since even a small ongoing leak can cause real water damage to cabinetry and flooring over time. E15 confirms the switch tripped, but doesn’t by itself tell you whether the leak is significant — that takes a closer look.
What Does E15 Mean?
A worn door gasket, a loose hose clamp inside the unit, a cracked spray arm, or a failing pump seal can all let water reach the base pan. Occasionally it’s simpler — using regular dish soap instead of dishwasher detergent causes oversudsing that escapes past the door seal or vents.
4 Steps to Diagnose E15
Power off and unplug the dishwasher.
Cut power before investigating any appliance with standing water involved.
Inspect the door gasket for visible damage.
Look for tears, gaps, or trapped food debris preventing a full seal.
Confirm you’re using dishwasher-specific detergent.
Regular dish soap oversuds dramatically and can trigger this same leak-detection response.
Have the pump seal and internal hoses checked if the gasket and detergent aren’t the cause.
An internal leak needs a technician’s more thorough inspection with panels removed.
Can You Fix This Yourself?
Checking the door gasket and confirming you’re using the right detergent are both quick things to rule out yourself. If neither explains it, locating an internal leak source means removing panels — a technician’s tools and experience make that a faster, more reliable process than guessing.
What Happens When You Call Star Appliance Repair
- Free service call with any completed repair — you’re never charged just to have us look
- Upfront price before any work begins, once the exact part is confirmed
- Most calls booked before noon get same-day service
- Manufacturer-approved parts, backed by our written warranty
Frequently Asked Questions
Can I run the dishwasher again after E15 trips?
Not recommended until you’ve identified the source — it may stop mid-cycle again, and running it risks worse water damage if the leak is ongoing.
Could the wrong detergent really cause this?
Yes — regular dish soap creates far more suds than a dishwasher is designed to handle, and escaping foam can trigger the same float sensor as an actual leak.
How much does a leak repair cost?
Entirely dependent on the source — a gasket is inexpensive, a pump seal is a more involved repair. Diagnosis comes first.
Is the float switch itself ever the problem?
Occasionally, if it’s stuck or miscalibrated, but a genuine leak is the far more common explanation.
*Same-day service is offered whenever possible and depends on technician availability, parts, and your location within the GTA.