Quote Originally Posted by Ninja View Post
Trying to fit a dimmer switch in an old house, for some reason it's not working at all, the light literally won't come on when fitted.

The wiring is simply two red wires (L1 and L2) and an earth.
I've wired L1 to the L1 terminal on the dimmer and L2 to the L2 terminal, and tried wiring the earth both to the earth terminal on the back box, and also the earth terminal that is on the dimmer itself, but neither configuration works.

Does anyone know what the problem is?
Could it just be a case of old circuitry that won't work with a dimmer or am I missing something?
Do the bulbs you are are using work with a dimmer? Not all LED bulbs do.