Washer-dryer combo displays E12; drying performance is poor or cycle aborts.

Safety: Disconnect power before accessing internal wiring.

• Clean sensor bars: Inside the drum, locate the two metal moisture sensor bars (often near the lint filter or on the drum front). Clean them thoroughly with a non-abrasive cleaner and a soft cloth to remove fabric softener residue.
• Check for damage: Inspect the bars for cracks or heavy wear. Ensure they are not loose.
• Inspect wiring: Access the backside of the sensor assembly (usually behind the front panel). Verify that the sensor wires are firmly connected and not broken.
• Test sensor circuit: With a multimeter, check continuity through the sensor when bridging the bars with a damp cloth. Lack of response indicates a failed sensor or wiring.

If E12 persists after cleaning and wiring checks, the sensor module or control board may require replacement by a professional.