Bosch · Dishwasher · Leak Detected

Bosch Dishwasher Error E15

Bosch dishwasher error E15 usually indicates a leak or water-detection fault. ECL records this code as “Water in Base”. A common cause listed on this page is Leak from a hose, pump, sump, seal, or heat-exchanger connection, but the exact cause can vary by model and appliance generation. Keep to the external checks and safety guidance below; do not remove covers or test internal or live components, and arrange professional diagnosis if the code persists.

Quick answer: Water in Base

In simple terms

Bosch dishwasher code E15 usually means Water in Base. Follow these four steps.

1Understand the code

See what the code usually means and why it may have appeared.

2Try safe checks

Try only the simple checks listed on this page. Do not take the appliance apart.

3Check if it is safe to use

Check the safety section before you keep using the appliance.

4Choose the next step

Use the next-step box to see whether to keep checking, find a part by model or get repair help.

What Bosch E15 means

E15 means the water-protection system has detected water in the dishwasher base area. A float switch keeps the drain pump running and blocks normal filling to reduce the risk of flooding. The water may come from an internal leak, oversudsing, a door-seal problem, or water spilled during maintenance.

Common causes

  • Leak from a hose, pump, sump, seal, or heat-exchanger connection
  • Excess foam caused by unsuitable or excessive detergent
  • Door-seal or spray-arm issue directing water where it should not go
  • Water spilled into the base during filter or hose work

Safe checks you can make

  1. Switch off at the mains and turn off the water supply
  2. Check only for visible external leaks around the door, hoses, and floor
  3. Remove excess foam from the visible tub without moving an integrated appliance
  4. Arrange inspection if the drain pump continues to run or E15 returns

Is it safe to keep using the appliance?

Do not run another cycle until the source of water in the base has been assessed. Keep the electrical supply and water isolated if leaking is visible.

Repair help

Need help with E15?

This fault may need proper testing with tools. If you have followed the safety guidance above, ECL can pass the fault details to a checked repairer who covers your area.

Find an ECL Verified repairer

No obligation. Your contact details are only shared after you submit the repair request, and only with a suitable ECL Verified repairer where coverage is available.

When to stop and call an engineer

Arrange service if E15 remains, the pump runs continuously, water is visible, or the code returns after the appliance has been isolated. An engineer should locate the leak rather than simply reset the float.

Your model may be different

Error-code meanings can vary by model, market and appliance generation. Confirm Bosch E15 against the instruction manual or support information for the exact model number before replacing parts or treating this page as a model-specific diagnosis.

Where this information comes from

Publisher: Error Code Lookup Editorial Team. This page is independent information written in our own words and reviewed with safety boundaries in mind.

Manufacturer information: Bosch UK User Manuals. Use the exact model number to verify model-specific wording and instructions.

Last reviewed: 2026-07-31

How Error Code Lookup researches and verifies pages · Report a correction or provide model-specific evidence

Frequently asked questions

What does E15 mean on a Bosch dishwasher?

E15 means the water-protection system has detected water in the dishwasher base area. A float switch keeps the drain pump running and blocks normal filling to reduce the risk of flooding. The water may come from an internal leak, oversudsing, a door-seal problem, or water spilled during maintenance.

What usually causes Bosch error E15?

Common causes include Leak from a hose, pump, sump, seal, or heat-exchanger connection; Excess foam caused by unsuitable or excessive detergent; Door-seal or spray-arm issue directing water where it should not go; Water spilled into the base during filter or hose work.

Can I safely fix E15 myself?

This fault may require professional diagnosis or repair. Only basic external safety checks should be attempted.

When should I call a professional for E15?

Arrange service if E15 remains, the pump runs continuously, water is visible, or the code returns after the appliance has been isolated. An engineer should locate the leak rather than simply reset the float.

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