Microwave displays E11; clock and basic functions work but cooking cannot be started

Note: Some OK microwaves use E11 to indicate a persistent child lock or safety lock condition.

• 1. Try manual child lock release: Press and hold the STOP/CANCEL button for 3–5 seconds, or press and hold the LOCK or KEY symbol button (refer to the user manual). Watch for a lock icon disappearing from the display.
• 2. Full power reset: Unplug the microwave for 10–15 minutes, then plug back in and set the clock. Attempt to start a simple cook cycle.
• 3. Check keypad response: If some buttons do not respond or respond incorrectly, the keypad membrane may be faulty. Replace the keypad assembly.
• 4. If E11 persists with a known-good keypad: The control PCB firmware or input circuitry is likely defective and the board should be replaced.