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Bosch dishwashers are renowned for their efficiency and performance. However, like any appliance, they may encounter issues from time to time. One common problem that Bosch dishwasher owners face is the E15 error code. If you see this error message on your dishwasher’s display panel, it signifies a water supply problem that needs attention. In this guide, we will explore the causes behind the Bosch E15 error code and provide solutions to help you resolve the issue and get your dishwasher back to working order.

Understanding the Bosch E15 Error Code: The Bosch E15 error code indicates a water supply issue, often caused by a blocked or kinked water inlet hose, a closed water tap, or a malfunctioning aqua-stop safety device. It is essential to address the problem promptly to avoid further damage to your dishwasher or water leakage.

Troubleshooting Steps for the Bosch E15 Error Code:

  1. Check the Water Inlet Hose: The water inlet hose carries water from the main supply to your dishwasher. Start by inspecting the hose for any kinks, twists, or blockages. Ensure that it is properly connected at both ends. If you find any kinks or twists, carefully straighten the hose. If there are any blockages, remove them by disconnecting the hose and running water through it. Once the hose is clear, reconnect it securely to the water supply and the dishwasher.
  2. Verify the Water Supply: A partially closed water tap can restrict the water flow to your dishwasher, triggering the E15 error code. To confirm if the water supply is adequate, locate the water tap connected to your dishwasher. Ensure that it is fully open, allowing unrestricted water flow. Turn the tap on completely and check if the error code persists. If the tap was previously closed or partially open, this simple step may resolve the issue.
  3. Examine the Aqua-Stop Safety Device: Bosch dishwashers are equipped with an aqua-stop safety device, which is designed to protect against water leaks. The aqua-stop device detects leaks or excessive water flow and shuts off the water supply to prevent flooding. If this safety device malfunctions, it can trigger the E15 error code. Inspect the aqua-stop device, typically located at the connection point of the water inlet hose to the dishwasher. Look for any signs of damage, such as cracks or breakage. Additionally, check for blockages that may hinder the device’s operation. Clean or replace the aqua-stop safety device as needed.
  4. Reset the Dishwasher: Resetting your Bosch dishwasher can sometimes clear error codes, including the E15 error. The process may vary slightly depending on the model, so it’s best to refer to your dishwasher’s user manual for specific instructions. In general, you can try the following steps:
    • Disconnect the dishwasher from the power source by unplugging it or switching off the circuit breaker.
    • Leave the dishwasher disconnected for a few minutes to allow any residual power to dissipate.
    • Reconnect the power supply or turn on the circuit breaker.
    • Restart the dishwasher and check if the E15 error code is cleared. If the code persists, move on to the next troubleshooting step.
  5. Seek Professional Assistance: If you have followed the previous steps and the E15 error code continues to appear, it is advisable to contact a qualified technician or Bosch customer support for further diagnosis and repair. Professional technicians have the expertise and specialized tools to identify and resolve complex issues that may be causing the error. They can inspect and troubleshoot the internal


  1. Common Causes of the Bosch Dishwasher E15 Error Code

Closed or Partially Closed Water Tap: One of the primary causes of the E15 error code is a closed or partially closed water tap. It’s essential to check if the water tap connected to your dishwasher is fully open. Sometimes, due to accidental manipulation or routine maintenance, the tap can be partially closed, restricting the water supply to the dishwasher. To resolve this issue, ensure that the tap is fully open and try running the dishwasher again.

Obstructions or Kinks in the Water Inlet Hose: Another common cause of the E15 error code is obstructions or kinks in the water inlet hose. Over time, debris, such as food particles or sediment, can accumulate in the hose, leading to restricted water flow. Additionally, the hose may develop kinks if it gets bent or pinched during installation or use. To address this issue, follow these steps:

  1. Turn off the dishwasher and disconnect it from the power supply.
  2. Locate the water inlet hose at the back of the dishwasher.
  3. Inspect the hose for any obstructions or kinks.
  4. If you find any obstructions, gently remove them using a soft brush or cloth.
  5. If there are kinks in the hose, carefully straighten them out.
  6. Reconnect the water inlet hose and ensure it is securely attached.
  7. Turn on the water supply and check for any leaks.
  8. Restart the dishwasher and see if the E15 error code persists.

Malfunctioning Aqua-Stop Safety Device: The aqua-stop safety device is designed to detect water leaks in the dishwasher and automatically shut off the water supply to prevent flooding. However, if the device malfunctions or detects a false leak, it can trigger the E15 error code. To troubleshoot this issue, you can try the following steps:

  1. Turn off the dishwasher and disconnect it from the power supply.
  2. Locate the aqua-stop safety device, typically found at the bottom of the dishwasher.
  3. Inspect the device for any visible signs of damage or misalignment.
  4. If you notice any issues, such as loose connections or damaged components, consider seeking professional assistance for repairs or replacement.
  5. If the device appears to be functioning correctly, you may need to reset it. Refer to the dishwasher’s user manual for specific instructions on how to reset the aqua-stop safety device.
  6. After resetting the device, reconnect the dishwasher to the power supply and water source.
  7. Restart the dishwasher and observe if the E15 error code persists.

Other Possible Causes: While the closed water tap, obstructions in the water inlet hose, and malfunctioning aqua-stop safety device are the most common causes of the E15 error code, there are other potential factors to consider. These may include:

  • Faulty pressure switch: The pressure switch is responsible for detecting the water level in the dishwasher. If it malfunctions, it may trigger the E15 error code. In such cases, it’s advisable to consult a professional technician for further diagnosis and repair.
  • Damaged or clogged filters: The dishwasher filters help prevent debris from entering the dishwasher’s internal components. If these filters become damaged or clogged, it can affect the water flow and trigger the E15 error code. Cleaning or replacing the filters may be necessary to resolve the issue.
  • Faulty water inlet valve: The water inlet valve controls the flow of water into the dishwasher. If the valve is defective or fails to open properly, it can result in insufficient water supply and trigger the E15 error code. A professional technician can examine the valve and determine if it