Smeg oven shows Er17 and beeps when any key is pressed; controls are locked.

Safety first: No internal work is required initially; keep the oven off if you suspect an electrical fault.

• Disable child lock: On many Smeg ovens, press and hold the key symbol or a specific button combination (e.g., '+' and '-' together) for several seconds to toggle the child lock. Refer to the user manual for the exact sequence.
• Power reset: If the lock will not clear, disconnect power for 5–10 minutes, then restore and try the unlock sequence again.
• Check touch panel: If certain keys do not respond or the lock symbol remains, the touch panel may be faulty. Inspect and, if necessary, replace the touch control PCB.
• Control board: Persistent Er17 after panel replacement suggests a main control board software fault; replace the board.