Welcome to our comprehensive guide on dealing with the Bosch dishwasher error code E15. Bosch, a renowned German company, is celebrated for crafting high-quality auto parts and appliances, with their dishwashers standing out for their cutting-edge features and remarkable durability. However, even the best-made appliances can encounter issues, leading to error codes that can disrupt their operation. When your Bosch dishwasher displays the error code E15, it’s signaling that there is water in the base of the dishwasher. While this might seem concerning, fear not, as we have all the details you need to diagnose and resolve this issue. In this guide, we’ll walk you through the steps to tackle error code E15, ensuring your dishwasher is back to its efficient self in no time. Stay connected with us for a wealth of valuable information to help you keep your Bosch dishwasher in top shape and prevent further disruptions to your home.

Bosch Dishwasher Error Code E15

Bosch Dishwasher Error Code E15

What is Bosch Dishwasher Error Code E15?

Bosch dishwashers are renowned for their reliability and cutting-edge technology, but even the best appliances can encounter occasional hiccups. When your Bosch dishwasher displays error code E15, it’s trying to tell you something important. This code indicates that there’s water in the base of the dishwasher, and the machine has detected this as a potential issue that needs your attention.

Common Reasons for Code E15:

Now that we’ve identified what the error code means let’s delve into the common reasons behind its occurrence:

  • Leaking or Blocked Inlet Valve: A common culprit for E15 is a faulty inlet valve or a valve that’s blocked by debris. This valve controls the flow of water into the dishwasher, and any malfunction can lead to water accumulation.
  • Drainage Issues: Proper drainage is essential for your dishwasher to function correctly. If there’s a blockage in the drain hose or pump, it can result in water pooling and trigger error code E15.
  • Faulty Float Switch: Inside your dishwasher’s base, there’s a float switch that rises with water levels. If this switch becomes stuck or malfunctions, it can falsely signal an overflow, leading to the error.
  • Door Seal Problems: The door seal plays a critical role in keeping water inside the dishwasher. If it’s damaged or improperly seated, water can escape into the base, causing the error.
  • Dishwasher Tilt: Sometimes, the dishwasher may not be level, causing water to accumulate in one area. This uneven distribution can activate error code E15.

How to Fix Bosch Dishwasher Error Code E15: A Step-by-Step Guide

Encountering error code E15 on your Bosch dishwasher can be frustrating, but don’t worry, we’re here to help you resolve it step by step. This guide will walk you through the process to get your dishwasher back up and running smoothly.

Before You Begin:

Before attempting any fixes, make sure to disconnect the dishwasher from the power source and turn off the water supply. Additionally, have some towels or a mop on hand to manage any water that may spill during the process.

Step 1: Access the Base of the Dishwasher

1.1. Open the dishwasher door and carefully pull out the bottom rack.

1.2. Gently remove the screws securing the dishwasher’s front panel and the kickplate at the bottom. These are typically located on the sides or top of the panel.

Step 2: Check for Water

2.1. With the front panel and kickplate removed, you’ll be able to see the base of the dishwasher.

2.2. Inspect the base for any visible water. If you see water pooling in the base, you’ve likely found the source of the problem.

Step 3: Identify and Fix the Cause

3.1. Leaking Inlet Valve:

  • If you suspect a leaking inlet valve, examine the valve for cracks or signs of leakage. Replace it if necessary.
  • Ensure that the valve is not clogged with debris. Clean it carefully.

3.2. Drainage Issues:

  • Inspect the drain hose and pump for any obstructions. Remove any debris or blockages you find.
  • Check the sink drain for clogs as well, as this can affect dishwasher drainage.

3.3. Faulty Float Switch:

  • If the float switch appears to be stuck or malfunctioning, try gently moving it up and down to see if it frees itself.
  • If the problem persists, you may need to replace the float switch.

3.4. Door Seal Problems:

  • Examine the door seal for damage, wrinkles, or misalignment. If you find any issues, replace the door seal.
  • Make sure the door is closing properly and creating a watertight seal when you latch it.

3.5. Dishwasher Tilt:

  • Check if your dishwasher is level. Use a leveling tool to ensure it’s sitting evenly on the floor. Adjust the dishwasher’s feet if needed.

Step 4: Reassemble and Test

4.1. After addressing the root cause of the issue, reattach the dishwasher’s front panel and kickplate securely.

4.2. Reconnect the dishwasher to the power supply and turn on the water.

4.3. Run a short cycle to test if the error code E15 has been resolved. Ensure there are no leaks during the cycle.

Step 5: Regular Maintenance

To prevent future occurrences of E15 and keep your Bosch dishwasher in top condition, consider these maintenance tips:

  • Clean the dishwasher’s filters and spray arms regularly.
  • Use dishwasher cleaner or vinegar to remove mineral deposits.
  • Check for and repair any water leaks promptly.


What is Bosch Dishwasher Error Code E15?

Bosch Dishwasher Error Code E15 indicates water in the base of the dishwasher, which could lead to potential issues.

What are the Common Causes of Error Code E15?

Common causes include leaking or blocked inlet valves, drainage problems, faulty float switches, door seal issues, and uneven dishwasher placement.

How Can I Fix Bosch Dishwasher Error Code E15?

To fix E15, follow these steps: disconnect power and water, access the base, identify and address the root cause, reassemble, and run a test cycle.

How Can I Prevent Error Code E15 from Recurring?

Regular maintenance, such as cleaning filters, checking for leaks, and ensuring the dishwasher is level, can help prevent E15 from happening again.

Should I Seek Professional Help for E15 Error?

If you’re uncertain about the cause or face difficulties during the troubleshooting process, it’s advisable to consult the manufacturer’s manual or seek assistance from a professional technician to ensure a thorough and accurate resolution.


In summary, understanding and addressing the Bosch dishwasher error code E15 is essential for keeping your dishwasher in optimal working condition. This code signals the presence of water in the dishwasher’s base and can be caused by issues like leaking inlet valves, drainage problems, faulty float switches, door seal issues, or an uneven dishwasher tilt. By following our step-by-step guide, you can confidently diagnose and resolve the E15 error, ensuring your dishwasher functions efficiently. Regular maintenance practices can further help prevent this error code in the future, keeping your Bosch dishwasher running smoothly for years to come. Don’t let E15 disrupt your dishwashing routine—tackle it with confidence and enjoy hassle-free dish cleaning once again.

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