How to … 3 way dimmer & 2 on/off switches
I recently replaced a 3 way rotary dimmer that has 2 on/off switches on the same circuit. Before the dimmer stopped working I was able to switch the lights on/off with the dimmer and either switch. Now that I have replaced the dimmer, I can’t do that. Once I switch off the lights with the dimmer, I can’t switch on the lights with either switch. When I replaced the dimmer the old dimmer had 2 black and 1 red wire while the new dimmer had 2 red and 1 black wire. Looking at the back of both dimmers I could see that each had 1 black and 1 red coming out of the same hole and the other red/black wire coming out of a different hole. Also .. on the new dimmer it had a tag (saying don’t use if single pole) on the red wire coming out of the same hole as the black wire. I tried to swap the 2 red wires on the dimmer and that didn’t change anything. It must be a wiring thing as I get the impression the dimmer is working like a single pole and not a 3-way.
Thanks in advance for your help.
in progress 0Electrical 2 years 5 Answers 539 views