Questions tagged [dimmer-switch]

Planning, installing and troubleshooting circuits using electrical dimmer switches for controlling the brightness of lighting.

Dimmer switches are electrical devices used to control the power in an electrical circuit, typically used to dim or brighten lighting. Early dimmers used variable resistors to do this, but that causes a lot of heat dissipation within the switch. Modern dimmers use solid state electronics and are a lot more energy-efficient. Recent improvements to the technology allow LED and CFL bulbs to be dimmed effectively.

When to use this tag

Use tag for any question about an electrical circuit that uses a dimmer. The and tags will probably be appropriate as well. For questions about planning a circuit using them, the tag may be useful. Finally, , or specifies the lighting technology.

Related tags

  • — lighting using CFL (Compact Fluorescent Lamp) bulbs.
  • — all about the electrical subsystem in the house.
  • — lighting using halogen (incandescent) bulbs
  • — lighting using LED (Light-Emitting Diode) bulbs.
  • — general tag for questions about lighting.
  • — for planning and installing wiring to carry electrical power.

External resources

568 questions
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Fix/find outlet with round dimmer switch

[See photos] I have an outlet on the wall of the stairs that has two switches (different sets of lights). The left switch was a round dimmer type switch. Push on/off and rotate to dim (infrequently used). I snagged it with a package and broke the…
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Why does my LED light flicker when turning it on using a dimmer switch?

I replaced a flushmont light fixure with a new dimmable LED Flushmount. I also replaced the old switch (see images below) with a dimmer switch. When I turn the LED on there is a flicker while it is turning on. After that initial dimmer it seems…
Tanner
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Trying to identify these wires on a switch

I think the black wires with the white and blue caps are the hot ones, and maybe the brown wire is ground or neutral? I'm trying to replace it with whats in the second image but not sure what the SW1 wire is (pass through maybe)?
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Dimmer switch remains powered with switch off!

I replaced a single pole switch with a Lutron Maestro dimmer. However, the line remains "hot" when dimmer turned off. Have verified that the hot wire in box is wired to bottom lug of dimmer. I thought the dimmer was defective so I purchased…
Grant
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Faulty dimmer lights / switch

My patio lights are on a dimmer switch. Recently when I press the switch the lights go on and then switch off immediately and stay off. I can press the switch on and off several times and nothing happens. If I hold the switch down the lights…
Jackie
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Dimmer switch: not enough wires?

This has been a great site over the years, thank you. Now it’s my turn to post a question. I did see some similar questions as mine; however, s/he used a different switch so I’m not sure if the answer is the same. I have two lights operated by…
SkierDude
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Caseta Switches 6WCL-WH-A

I think I am getting pretty close with this but not 100% there yet. I have a hallway light with two switches at each end. On / off at each end will turn the hall light on / off. Am swapping out dumb switches with Lutrons and have 2x PDW-6WCL. (right…
James
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Installing a Lutron dimmer with 3 light switches (5 wires)

Ran into an issue trying to replace a light switch with a Lutron dimmer switch. There are three switches for the light. As you can see from the photo, I have 5 wires into the current switch. I only have 4 wires on the Lutron (Red, Black, Red,…
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Single Dimmer for multiple lights each having a one way switch

Can I use a single dimmer for multiple lights each having a one way switch? Dimmer wattage is taken care
Sudip
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How Do I Fix This Broken Switch?

What's the simplest path for me to fix this? Is it possible for me to order a new "cap" somehow or do I need to replace the whole switch plate? Thanks in advance!
blaster
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Can I replace this switch with a dimmer?

I recently moved into a new rental. It is older construction but was completely remodeled. I did some some older wiring in the basement but the functional wiring seems to be new and modern code/procedure. This switch doesn't make sense. The hot…
Doug
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How can I wire an Insteon switch in this situation?

I've been installing Insteon switches around the house, and I've run into a bit of an issue. In our bedroom, we have a switch that controls the fan lights and recessed lights as well as single switches that control each separately. After removing…
cabtex
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Why would a dimmer start buzzing when some lights are broken?

I have a dimmer that controls a 3-light fixture (filled with 35W halogen incandescents). When the second light went dark (I procrastinated with replacing the first) the last one starts flickering, especially when dimmed a bit, and the dimmer starts…
ratchet freak
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Do TRIAC dimmers "wear out"?

I have a 3-bulb fixture on a 3yo dimmer. It seems -- and this is really impossible to prove -- that the buzzing/singing of the dimmed bulbs has gotten worse over time. It doesn't really make sense to me that the circuitry would get worse over time…
Chris Nelson
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How can I identify dimmable lights that will work as dimmable with my dimmer lamp?

I have a lamp with a dimmer switch (which I believe was made to dim incandescent lights), and I've tried a couple of LED bulbs labeled as dimmable with it, and without exception they go from off to full brightness. Is some newer grade of dimmable…
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