Microwave shows child lock symbol and will not start, but no error code is displayed.

Safety warning: None; this is a user setting.

Steps to try:

• 1. Check display: Look for a key symbol or "LOC" indicator on the Siemens microwave display.
• 2. Deactivate lock: Refer to the user manual. Common methods include pressing and holding the Stop/Cancel button or a combination of buttons (e.g., "Clock" + "Minus") for several seconds.
• 3. Power reset: If unsure, unplug the microwave for a minute, reconnect, and try the lock deactivation procedure again.

If the lock symbol remains and controls are unresponsive, the control panel may be faulty and require service.