Dryer displays E12; may be associated with reverse rotation or drum direction control

Safety first: Disconnect from mains before accessing the drum, motor, or control board.

• Check drum movement: With the door open and power off, rotate the drum by hand in both directions. It should move freely. If stiff or scraping, inspect for foreign objects or damaged drum bearings.
• Inspect belt and pulley: Access the belt and idler pulley. Ensure the belt is correctly tensioned and not jammed. Free any obstructions.
• Check motor wiring: Inspect the motor connector and wiring for loose pins or burnt contacts. Reseat connectors firmly.
• Observe operation: Reconnect power and run a cycle while observing (with panels safely in place). If the drum only turns in one direction or stops when it should reverse, the motor or PCB relay may be faulty.
• Professional repair: Replacement of motor or PCB relays involves advanced electrical work; if E12 persists after mechanical checks, contact a qualified technician.