Microwave display shows E05 and unit will not start any cooking program.

Safety: Disconnect power before removing the control panel. Do not spray liquids directly onto the control area.

Basic troubleshooting:

• 1. Power reset: Unplug the Blomberg microwave for 5–10 minutes to allow the control board to reset. Plug back in and check if E05 clears.
• 2. Check for stuck keys: Gently press each button on the keypad several times. If any button feels stuck or does not click, it may be causing a constant input.
• 3. Dry the panel: If the error appeared after cleaning or steam cooking, moisture may be behind the keypad. Leave the door open and allow the unit to dry for several hours, or overnight, then test again.

Advanced steps:

• 4. Inspect keypad ribbon cable: Unplug the unit, remove the control panel cover, and check the flat ribbon cable from the keypad to the control board. Reseat the connector and inspect for corrosion or damage.
• 5. Replace keypad or control panel: If specific keys do not respond or E05 persists, the touch membrane or complete control panel assembly may need replacement. Follow Blomberg service documentation for your model.