Do dimmer switches wear out?
Do dimmer switches wear out? For example, if a dimmer is rated at 600 watts but it is used to control nine 100-watt fixtures, its safe capacity is exceeded by 50 percent and it will burn out prematurely and stop working without warning. When it does fail, it may fail in such a way that the lights remain on, or in such a way that they all go out. What do you need to replace a dimmer switch? Disconnect all wires from the old switch. If you are replacing an existing dimmer, you would need to unscrew the wire nuts...