Choosing the right switch
Dimmers must match the lighting — many older dimmers aren't designed for LEDs and cause flicker or buzz. Three-way and four-way switches let you control a light from two or more locations, which is essential for stairs, long hallways and rooms with two entrances.
Many smart switches require a neutral wire in the switch box, which older homes don't always have. An electrician can confirm what your boxes support and recommend a compatible option. See smart lighting for connected controls.
What the work typically involves
Check the box
Confirm wiring, neutral availability and box space.
Select the control
Match the switch or dimmer to the lighting load and use.
Install and connect
Install the device and make secure connections.
Configure and test
Set dimmer ranges, program timers or pair smart devices.
Common reasons homeowners call
- LED lights that flicker on old dimmers
- Stairs with a switch at only one end
- Bathroom fans that should run on a timer
- Worn switches that feel loose
- Adding smart control to lights
Signs a switch needs replacement now
- Switch feels warm or hot
- Crackling or popping when switching
- Sparks visible through the switch plate
- Lights flicker when the switch is touched
- Scorch marks on the plate
Safety considerations
Hot switches are a warning. A warm switch, especially a dimmer, can be normal to a slight degree — but hot, buzzing or discolored switches point to overload or loose connections and should be replaced promptly.
What an electrician will check
- Neutral wire availability
- Dimmer rating versus connected load
- Three-way/four-way wiring
- Box fill for larger smart devices
- Grounding of the switch
Related electrical problems
Related residential services
Smart Lighting
Smart switches, dimmers, scenes and app or voice control for indoor and outdoor lighting.
Indoor Lighting
Interior lighting design and installation — kitchen, living room, bathroom, closet, hallway and stair lighting.
Ceiling Fan Installation
Installing new ceiling fans and replacing light fixtures with fans — with fan-rated boxes and proper switching.
Smart Home Electrical
Wiring and installing smart switches, thermostats, doorbells, cameras, hubs and connected devices in your home.
Frequently asked questions
Dimmers can buzz when they're not rated for the connected load — especially LEDs — or when overloaded. An LED-compatible dimmer usually fixes it.
Yes. A three-way setup can usually be added, though it may require running new wiring between locations. Some smart switches offer wireless companion switches.
Many do. If your switch box doesn't have one, there are some no-neutral models, or a neutral can be added.