Bosch SilencePlus Dishwasher Error Code E15: Causes, Fixes & Reset Guide

If your Bosch SilencePlus dishwasher is displaying the E15 error code, don't panic. This is one of the most common error codes found on Bosch dishwashers and usually indicates that the appliance's leak protection system has been activated.

In many cases, the issue is caused by water collecting in the dishwasher's base pan due to a leak, overflow, or excessive foam. While some causes are simple to address, others may require professional repair.

This guide explains what the Bosch SilencePlus E15 error means, the most common causes, how to troubleshoot the problem safely, and when it's time to call a technician.

What Does Bosch SilencePlus Error Code E15 Mean?

The E15 error code means the dishwasher has detected water in the bottom base of the appliance, activating the AquaStop (leak protection) system.

When this safety system detects water in the base tray, it automatically stops the wash cycle and may continuously run the drain pump to help prevent flooding.

Common Causes of Bosch SilencePlus E15 Error

1. Internal Water Leak

A damaged hose, loose connection, cracked sump, or worn seal can allow water to leak into the dishwasher's base.

Common leak sources include:

• Door gasket

• Drain pump

• Circulation pump

• Water inlet valve

• Internal hoses

• Tub seals

2. Excessive Detergent or Soap

Using too much detergent or the wrong type of soap can create excessive foam.

The foam may overflow into the base pan, triggering the leak detection sensor even though there isn't an actual plumbing leak.

3. Dirty or Clogged Filters

Food debris can block the filter system and prevent proper drainage.

Water may back up inside the dishwasher and eventually overflow into the leak tray.

4. Blocked Drain Hose

A clogged or kinked drain hose can prevent water from leaving the dishwasher.

As water accumulates, it may trigger the E15 error.

5. Faulty Float Switch

The float switch monitors water inside the dishwasher's base.

If the switch sticks or becomes defective, it may falsely report water leakage.

6. Worn Door Seal

Over time, the rubber door gasket may crack, shrink, or become dirty.

This can allow water to escape during the wash cycle.

Symptoms of Bosch SilencePlus E15 Error

You may notice:

• Dishwasher stops during a cycle

• E15 displayed on the control panel

• Drain pump runs continuously

• Dishwasher won't start another cycle

• Water remaining inside the dishwasher

• Water leaking underneath the appliance

How to Fix Bosch SilencePlus Dishwasher Error Code E15

Step 1: Turn Off the Dishwasher

Disconnect the dishwasher from the electrical outlet or switch off the circuit breaker.

Also turn off the water supply before inspecting the appliance.

Step 2: Check for Visible Leaks

Inspect around the dishwasher for:

• Water on the floor

• Loose hoses

• Damaged door gasket

• Water dripping underneath

If you find an obvious leak, repair it before restarting the dishwasher.

Step 3: Clean the Filters

Remove the bottom rack.

Take out the filter assembly and rinse it thoroughly under warm running water.

Clean away:

• Food particles

• Grease

• Soap buildup

Reinstall the filter securely.

Step 4: Inspect the Drain Hose

Check that the drain hose:

• Is not kinked

• Is not clogged

• Is properly connected

• Has no visible damage

Replace it if necessary.

Step 5: Reduce Excess Foam

If too much detergent was used:

• Remove standing foam.

• Run a rinse cycle without detergent after the issue has been resolved.

• Always use dishwasher detergent specifically designed for automatic dishwashers.

Step 6: Reset the Dishwasher

Some temporary software glitches can be cleared by resetting the dishwasher.

To perform a basic reset:

1. Turn off the dishwasher.

2. Disconnect power for about 5 minutes.

3. Restore power.

4. Start a new wash cycle.

If E15 immediately returns, an underlying leak or sensor issue likely still exists.

Can You Clear the E15 Error Yourself?

Sometimes, yes.

If the error was caused by:

• Excess foam

• A temporary overflow

• Minor water accumulation

Cleaning the dishwasher and allowing the base to dry may resolve the issue.

However, if water continues to collect in the base, simply clearing the error will not fix the underlying problem.

When Should You Call a Technician?

Professional service is recommended if:

• The E15 error returns repeatedly.

• Water leaks from underneath the dishwasher.

• Internal hoses are damaged.

• The circulation pump leaks.

• The float switch is defective.

• The dishwasher continues running the drain pump even after drying.

Ignoring recurring leaks can cause additional damage to electrical components.

How to Prevent Bosch E15 Errors

You can reduce the chances of seeing the E15 error by:

• Cleaning the dishwasher filter every month.

• Using only automatic dishwasher detergent.

• Avoiding excessive detergent.

• Inspecting the door seal regularly.

• Checking hoses for wear.

• Running a dishwasher cleaner every few months.

• Repairing small leaks before they become larger problems.

Frequently Asked Questions

Can I continue using my Bosch dishwasher with an E15 error?

No. The E15 error activates the dishwasher's flood protection system. Continuing to operate the appliance without resolving the cause may lead to further damage.

Does E15 always mean there is a leak?

Not always. Excessive foam, overflow, or a faulty float sensor can also trigger the error, although an internal leak is one of the most common causes.

Why does the drain pump keep running?

The dishwasher enters flood protection mode when the E15 error is detected. Running the drain pump continuously helps prevent additional water from accumulating.

Will unplugging the dishwasher clear the error?

Disconnecting power may temporarily reset the control board, but the error will usually return if water remains in the base or the underlying issue has not been fixed.

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