Safety first: Unplug the dishwasher before accessing the light or door switch.

Check door switch: Verify that the door switch operates correctly and that other door-dependent functions (like starting) work.
Access light module: Remove the inner liner or light cover to reach the lamp or LED module.
Inspect and replace: Check for visible damage or darkened lamp. Replace with the correct SMEG lamp or LED module.
Check wiring: Ensure the light's wiring harness is firmly connected and not damaged.

Dishwasher interior light (on models equipped) does not turn on when the door is opened.

Possible Causes