Have you ever walked into a room and flicked the light switch, only to have it flicker or not turn on at all? A faulty light switch isn't only frustrating, but any kind of mechanical failure ...

Stop walking across a dark room to turn on the light. Install a 3-way switch and control lights from two locations.

Here's how to swap outdated three-way light switches for something much better.

Three-way switches are common at staircases, hallways or large rooms with multiple doorways. Most of the problems with these switches result from a miswired switch.