Brandt induction or ceramic cooktop controls are locked; a key symbol or lock indicator is lit and zones cannot be activated.

Safety first: This is usually not a hardware fault; no need to disconnect power unless controls are unresponsive.

Steps:

• Unlock sequence: Refer to the user manual. Commonly, press and hold the key/lock symbol for 3–5 seconds until the lock indicator turns off.
• Power reset: If the lock will not clear, turn off power for 5 minutes and try again.
• Check for moisture: Clean and dry the touch area; moisture can simulate a constant press on the lock key.
• Panel fault: If the lock symbol remains and buttons do not respond, the touch panel PCB may be faulty and require replacement.