A light switch is the simplest of electrical devices. Flip the switch, electricity flows. Flip it again, electricity stops.

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Q: Tim, I need you to mediate a dispute between my husband and me. We're building a new home, and there are several places where two or more switches can be used to control lights. I like the ...

Three-way switches allow you to control lights from two locations - from two doorways to a room, from the top and bottom of a stair, from your house and garage, etc. Despite the name, three-way ...

Q. I installed a dimmer switch in my dining room and now the chandelier only works half the time. There are two switches in the room that control the light. They worked fine before I started the job.