Washer-dryer shows E12 and may stop during drying; condenser area may be very hot

Safety first: Unplug the appliance and allow it to cool before working near the dryer system.

Step-by-step checks:

• 1. Clean condenser and lint paths: Remove the condenser unit (if user-serviceable) and flush thoroughly with warm water. Clean all accessible lint from the condenser housing and ducts.
• 2. Check condenser pump (if fitted): Some Neff washer-dryers use a small pump to move condensed water. Access the pump near the base of the machine and check for blockages or a jammed impeller. Clean or replace as needed.
• 3. Inspect air ducts and fan: Remove panels to access the dryer air path. Ensure the fan spins freely and ducts are not clogged with lint or scale.
• 4. Test condenser NTC sensor: Locate the sensor on or near the condenser. Measure its resistance and compare with specifications. Replace if readings are out of range.

When to call a technician: If E12 persists after thorough cleaning and basic checks, a deeper diagnosis of the dryer system and control board is required.