RCA oven displays F90 and the door remains locked after self-clean or will not lock to start self-clean.

Safety first: Turn off power at the breaker. The door lock mechanism can move suddenly; keep hands clear.

• Allow oven to cool: After self-clean, wait until the oven is fully cool. Some models keep the door locked until temperature drops.
• Manual release (if available): Consult your RCA manual for a manual door lock release. This is often accessible through the top or front panel.
• Access lock assembly: Remove the top or rear panel to reach the door lock motor and latch.
• Check for binding: Manually move the latch to see if it binds. Lubricate lightly with high-temperature-safe lubricant if mechanical friction is the issue.
• Test motor and switches: Use a multimeter to check motor windings for continuity and verify lock/unlock switch operation.
• Replace assembly: If the motor is weak or switches are faulty, replace the door lock motor and latch assembly. If the assembly is good but not receiving power, suspect the electronic oven control board.