I removed an old ceiling light/fan fitting. There were 4 wires coming out of the attic into this old unit: copper, red, black, white.

I have a new light/fan combo to fit. It only has 3 wires: green, white, black.

How do I join these?

Then for the wall switch:

There used to be 2 switches; one for the fan, one for the light.

The new wall switch is a single unit with a light button and a fan button on the front. There are 3 wires coming out the back; green, black and white.

How do I wire the wall fittings?

Many thanks if you can help.

  • 1
    Did either of the devices come with documentation that includes wiring diagrams?
    – Tester101
    Apr 12, 2015 at 22:00
  • or a diagram on the new switch Apr 12, 2015 at 23:03
  • Or even brand and model number/name of fan. Also did the switch come with the fan?
    – diceless
    Apr 13, 2015 at 2:26

1 Answer 1


I'm assuming the new switch came with the new light/fan unit. In that case, cap the red wire in both boxes. It must be a communicating switch. So wire it as you would any single-pole light switch and light.

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