Bosch Dishwasher Error code E09

The Bosch E09 error code signals a heating fault within the dishwasher. This fault can be attributed to a malfunction in the heater relay on the main control board or a defective heater itself. When your dishwasher’s heating element fails to function correctly, it can impact the appliance’s ability to achieve optimal cleaning and drying results.

If you encounter the E09 error code on your Bosch dishwasher, you may wonder how to pinpoint the exact problem. Here’s a step-by-step guide for diagnosing and troubleshooting the heating fault:

1. Visual Inspection:

Start by visually inspecting the dishwasher to ensure there are no visible obstructions or loose connections that might be affecting the heating element.

2. Resistance Check:

• To check the heater’s resistance, you’ll need a multimeter. Disconnect the dishwasher from the power source and access the heating element, which is typically located at the bottom of the dishwasher.
• Use the multimeter to measure the resistance across the heating element’s terminals. Consult your Bosch dishwasher’s manual for the specific resistance range that should be displayed.
• If the measured resistance falls outside the recommended range, it’s likely that the heating element is defective and needs to be replaced.

3. Control Board Inspection:

If the heating element checks out within the correct resistance range, it’s time to inspect the main control board. A trained technician may be required to diagnose and address potential issues with the control board.

Professional Assistance

While some dishwasher issues can be resolved by homeowners, a heating fault indicated by the E09 error code may require the expertise of a trained technician. If the heating element is in good condition but the problem persists, it’s advisable to contact a professional appliance repair service. They can accurately diagnose the issue and ensure the main control board or other components are functioning correctly.