Dryer displays E12, cycle may start but stops unexpectedly, especially on sensor-dry programs

Safety first: Disconnect the dryer from mains before accessing internal wiring.

Step-by-step checks:

• Clean sensor bars: Inside the drum, locate the two metal strips (moisture sensors) usually near the lint filter opening. Clean them thoroughly with a soft cloth and a bit of white vinegar or mild detergent to remove fabric softener residue.
• Inspect connections: From behind the front panel, trace the wires from the sensor bars to the harness. Ensure connectors are secure and wires are not broken.
• Continuity test: With the dryer unplugged, test continuity from each sensor bar to the connector on the harness. Repair any open circuits.
• Test on timed cycle: Reassemble and run a timed (non-sensor) cycle. If the dryer works normally on timed but E12 appears on sensor cycles, the moisture sensor or control board sensor circuit may be faulty.
• Replace sensor: If wiring is intact and cleaning does not help, replace the moisture sensor assembly or module.

Note: Control board sensor input failures require board replacement by a professional.