Dryer stops with E10; on heat pump models, may be accompanied by no heat and compressor not running.

Safety first: Heat pump systems are sealed refrigeration circuits. Do not attempt to open or recharge the system yourself. Always unplug the dryer before inspection.

Step-by-step checks (user level):

• Clean all filters and condenser: Ensure the lint filter, secondary filters, and condenser (if accessible) are completely clean to avoid airflow-related false errors.
• Check ambient conditions: Heat pump dryers may fault if used in very cold rooms. Ensure the appliance is in a room within the recommended temperature range (typically 10–35°C).
• Listen for compressor: Start a cycle and listen for the compressor starting after a few minutes (a low humming sound). If it never starts and E10 appears, a system fault is likely.

When to call a technician: E10 usually requires professional service. A certified technician must diagnose compressor, inverter, and refrigerant issues with proper tools.