"Paul C" wrote:
Hi
Moved into house 2 weeks ago. There is a switch inside next to the front
door for an outside light. It has a flap that slides down and has a rotary
dial with 0,2,4,6 and 8 around it and a turnable knob saying 'Early' one
way and 'Late' the other.

What is it and how does it work?. It has no manufacturer, part number or
instructions on it. The switch turns the light on/off whatever the
settings.

Many thanks

SS

Sounds like a light switch countdown timer that will turn the light off
after the set interval. Try setting it to 2, with the light on, and see if
it turns the light off after 2 hours. It may be faulty.