Washer will not start a cycle and the door will not lock; E01 appears shortly after pressing Start.

Safety first: Unplug the Rosières washer from the mains and turn off the water supply before any work. Never work on the appliance while it is powered.

Step-by-step checks:

• Inspect the door and latch: Open and close the door firmly. Check that the metal/plastic latch hook engages fully with the door interlock on the cabinet. If the door is sagging, gently lift while closing and try again. Look for cracks or play in the latch.
• Check the door seal area: Ensure no clothing, coins, or debris are trapped between the door and the rubber gasket preventing full closure.
• Access the door interlock: Remove the front door seal clamp (spring band) and peel back the gasket. Locate the door interlock assembly fixed with 2–3 screws. With power still disconnected, remove the screws and gently pull the lock forward.
• Test wiring: Inspect the wiring harness to the door lock for burnt connectors, loose plugs, or broken wires. Reseat the connector firmly. If you have a multimeter, check continuity of the lock terminals according to a wiring diagram or service manual.
• Replace the door lock: If the interlock shows signs of burning, melting, or fails continuity tests, replace it with a compatible Rosières door lock assembly. Transfer wiring one by one to the new lock, refit screws, and reinstall the door seal and clamp.
• Control board check (advanced): If a known-good door lock and wiring are OK but E01 persists, the main PCB may be faulty. Visual inspection for burnt tracks or swollen components can confirm suspicion, but replacement/programming is typically a job for a qualified technician.

When to stop: If you smell burning, see melted plastic, or are unsure about electrical testing, stop and contact an authorized Rosières service center.