Display shows LOCK or a lock icon; oven controls do not respond, though the clock may still display.

Safety first: No internal work is required for this condition; do not disassemble the oven for a control lock indication.

Step-by-step checks:

• Disable control lock: On most Haier ovens, press and hold the Lock or Stop/Clear key for 3–5 seconds until the lock icon disappears. Refer to the user manual for the exact key combination.
• Power reset: If the lock will not clear, turn off power at the breaker for 2 minutes, then restore and try the key combination again.
• Check for stuck keys: Press each key individually to ensure they move freely and are not stuck in the pressed position.

When to replace parts: If the lock indication will not clear and keys do not respond, the touch keypad assembly or control board may be faulty and require replacement.