F90 displayed; oven door will not lock or unlock during self-clean

Safety first: Disconnect power at the breaker. Ensure the oven is cool before working near the door lock.

• Check for mechanical jam:
  • Inspect the door latch area for bent metal, debris, or misalignment.
  • Gently move the latch with a screwdriver (with power off) to see if it is stuck.
• Access lock motor:
  • Remove the rear panel or top panel (depending on model) to access the door lock motor assembly.
  • Inspect the lock motor, linkage, and switches.
• Test lock motor and switches:
  • With a multimeter, check continuity of the lock motor coil and the lock/unlock switches according to the wiring diagram.
  • If the motor is open or the switches do not change state when actuated, replace the door lock motor assembly.
• Inspect wiring:
  • Check harness from lock assembly to EOC for damage or loose connectors.
• Control board:
  • If the lock assembly tests good and wiring is intact, the EOC may not be driving the lock; replace the electronic oven control board.

Note: To manually unlock a stuck door, consult the service manual for your specific Frigidaire Professional model; many have a manual release accessible from the top or rear.