F5 appears on the display; oven door may not lock or unlock during self-clean.

Safety first: Disconnect power before removing the top or rear panels. Beware of sharp metal edges.

• Check door movement: Ensure the door closes fully and is not obstructed by racks or debris. Try gently pressing on the door while starting a self-clean to see if the lock engages.
• Access lock assembly: On many Blomberg ranges, the lock motor is accessible from the top or rear. Remove the necessary panel and locate the lock motor and switches.
• Inspect linkage: Look for bent rods, broken plastic pieces, or grease buildup preventing movement. Clean and lubricate lightly with high-temperature-safe lubricant if needed.
• Test lock motor and switches: With a multimeter, check continuity of the lock switches and resistance of the motor coil. Replace the lock assembly if open or mechanically seized.
• Check wiring: Ensure the harness from the lock assembly to the EOC is intact and firmly connected.

If the door is stuck locked with food inside, do not force it open; a technician may need to manually release the lock from inside the top panel.