Washer-dryer combo shows D20 and may not start or may stop with no obvious mechanical issue.

Safety first: Ensure the appliance is properly grounded and connected to a stable power supply.

• Perform a hard reset: Unplug the washer-dryer combo for at least 10–15 minutes. Press and hold the Start/Pause button for 10 seconds (if applicable) to discharge residual power, then reconnect and test.
• Check power supply: Verify that the outlet provides stable voltage and that there are no frequent power cuts. Avoid using long extension cords.
• Inspect control board: Remove the top panel and visually inspect the main control board for burnt components or corrosion. If visible damage is present, replace the board.
• Firmware update (if available): Some newer Brandt models may support firmware updates via service tools; this must be done by an authorized technician.