We take electrical switches for granted. Flick a wall switch and something is supposed to happen, typically a light or fan goes on. So what do we do if the light or fan doesn't come on? We call a meeting of the Fix-It Club!

How Does It Work?

An electrical switch is a device designed to break the flow of electric current. When turned on, a switch completes the electrical circuit and current flows to the light or other device the switch controls. When the switch is off, the electrical circuit is not complete, denying power to whatever the switch controls.

The most common household switch is a two-way (sometimes called a single-pole) switch, which is a toggle switch marked on and off. Other household switches include the three-way switch for controlling a light from two switches, and the dimmer switch for varying the amount of electricity that goes to the light or other apparatus.

What Can Go Wrong?

Switches, by design are relatively simple, so typically either they work or they don't. The other option is that they don't work safely, meaning the electricity arcs or sparks in the switch--a potential fire hazard.

Most electrical switches wear out from use in 5 to 20 years, depending on quality and frequency of use. Additionally, wires can become loose and not make connection, caused by poor installation or other factors.

Fix-It Tip

If you're buying a new switch that will get lots of use, spend a little more and buy one that is labeled "commercial" or "spec-rated." Internal parts are sturdier and will stand up to use longer--and safer.