Microwave shows E15 and beeps when starting; may indicate a child lock or safety lock condition that cannot be cleared normally.

Safety first: This error is typically low-risk but always unplug the unit before removing panels.

Step-by-step checks:

• 1. Attempt normal unlock: Refer to the Paderno user manual for the specific key combination to toggle the child lock (often holding STOP/CLEAR or a LOCK symbol key for 3–5 seconds).
• 2. Power cycle: Unplug the microwave for 10 minutes to reset the control board. Plug back in and try unlocking again.
• 3. Check keypad for stuck keys: Press each key individually and ensure none are physically stuck or unresponsive.
• 4. Inspect control panel: If liquids have spilled into the keypad area, the membrane may be shorted. Dry thoroughly and, if necessary, replace the touch control panel.
• 5. If E15 persists: The control board may have a firmware or memory fault and require replacement.