Washer-dryer combo displays D09 and does not heat or dry clothes in drying cycles.

Safety first: Unplug the appliance. Dryer components can be very hot; allow full cooling before service.

• Check basic airflow: Clean the lint filter and any accessible condenser filter (for condenser-type Brandt combos). Ensure air inlets and outlets are not blocked.
• Access dryer heater: Depending on model, the dryer heater is usually located in a duct at the rear or side. Remove the top and rear panels to access the heater assembly.
• Test dryer heating element: Disconnect the heater wires and measure resistance. An open circuit indicates a failed element; replace the dryer heating element assembly.
• Check thermal fuse and thermostats: Locate the thermal fuse and thermostats on the heater housing. Test for continuity; any open device must be replaced. Investigate and correct airflow blockages that may have caused overheating.
• Inspect dryer NTC sensor: Measure resistance and compare with Brandt specifications. Replace if out of range.
• Clean condenser and ducts: Remove and thoroughly clean the condenser unit (if removable) and internal air ducts. Lint buildup can cause overheating and repeated D09 errors.