You can replace a dimmer with a standard switch in about 15 minutes

A dimmer switch and a regular switch are wired almost identically, so swapping one for the other is straightforward. The main difference is that a dimmer has extra circuitry inside to control brightness, while a regular switch straightforward turns the light on or off. Once you turn off power at the breaker, the job is mostly unscrewing the old switch, disconnecting three wires, and connecting them to the new one in the same order.

The one real constraint is that some dimmers are designed to work only with certain types of bulbs — usually incandescent or halogen. If your dimmer is connected to LED or CFL bulbs, those bulbs may flicker or hum. Replacing the dimmer with a regular switch will stop that problem when ready, since a standard switch doesn't try to dim anything.

Key Takeaways

  • Turn off power at the breaker before touching any wires, and test the switch with a voltage tester to confirm the power is off.
  • A dimmer has the same three wire connections as a regular switch — hot (usually black), neutral (usually white), and ground (usually bare copper or green).
  • Disconnect the wires one at a time and reconnect them to the new switch in the same order to avoid mixing them up.
  • A regular switch costs $1 to $5, while a dimmer typically costs $10 to $25, so you are not losing money by switching back.

What you need before you start

Gather a flathead screwdriver, a Phillips screwdriver, and a non-contact voltage tester (also called a voltage pen). The voltage tester is the most important tool — it tells you whether power is actually off before you touch any wires. You can buy one at any hardware store for $10 to $20, and it works on any outlet or switch in your house.

You do not need a electrician's license or special training for this job. You are not running new wire or installing anything into the wall — you are straightforward swapping out one switch for another. The new switch should be the same type as the old one: if your dimmer is a single-pole switch (controls the light from one location), buy a single-pole regular switch. If it is a three-way switch (controls the light from two locations), buy a three-way regular switch. Check the dimmer packaging or look at the back of the switch itself — it will say "single pole" or "three way".

Turn off power and test before you touch anything

Go to your breaker panel and flip off the breaker that controls the light. The breaker label should tell you which one it is, but if you are not sure, flip the breaker and have someone test the light switch to confirm the light goes off.

Once the breaker is off, use your voltage tester on the switch itself. Touch the tester to the metal parts of the switch or to the wires connected to it. If the tester beeps or lights up, power is still on — go back to the breaker panel and try a different breaker. If the tester stays silent, power is off and you can proceed. This step takes 30 seconds and prevents injury.

Remove the old dimmer switch

Unscrew the cover plate (the plastic or metal faceplate) and set it aside. Then unscrew the two screws on the sides of the dimmer switch itself — these hold it in the wall box. Gently pull the switch out of the wall until you can see the wires connected to the back.

You will see three wires: one black (hot), one white (neutral), and one bare copper or green (ground). The black and white wires are usually held in place by small screws on the back of the switch. Loosen each screw and pull the wire out. Do this one wire at a time and remember which position each wire came from — or better yet, take a photo of the back of the switch before you disconnect anything.

Connect the wires to the new switch

A regular switch has the same three terminals as a dimmer: one for hot (black), one for neutral (white), and one for ground (copper or green). Insert each wire into the same terminal it came from on the old switch. Tighten the screws firmly so the wires do not slip out.

The order matters only in the sense that you should match the old switch: black to the same terminal, white to the same terminal, ground to the same terminal. If you mix them up, the switch will not work or the light will be on when the switch is off (and off when it is on). If that happens, straightforward turn the breaker off again, swap the black and white wires, and try again.

Push the switch back and find it

Once all three wires are connected and tight, carefully push the switch back into the wall box. The switch should slide in smoothly — do not force it. Screw the two mounting screws back in until the switch is flush with the wall.

Screw the cover plate back on and turn the breaker back on. Test the switch: it should turn the light on and off with no dimming. If the light does not come on, turn the breaker off, check that all three wires are still tight, and try again.

Troubleshooting if the switch does not work

If the light does not turn on, the most common cause is a loose wire. Turn the breaker off, pull the switch out slightly, and check that each wire is still firmly in its terminal. Tighten any loose screws and try again.

If the light is on when the switch is off (or vice versa), the black and white wires are reversed. Turn the breaker off, swap those two wires, and turn the breaker back on. This is the only way to fix a reversed polarity, and it is safe to do as long as the breaker is off.

If the light flickers or hums, the problem is usually not the switch itself but the bulbs. LED and CFL bulbs sometimes flicker with a regular switch if they were designed to work with a dimmer. Try replacing the bulbs with incandescent or halogen bulbs, or buy a dimmer that is rated for LED bulbs.

Frequently Asked Questions

Do I need to hire an electrician to replace a dimmer with a regular switch?

No. This is a basic swap that takes about 15 minutes and requires only a screwdriver and a voltage tester. As long as you turn off the breaker and test for power before touching the wires, it is safe to do yourself.

What if my dimmer has four wires instead of three?

Some dimmers have a fourth wire for a neutral connection, which is common in newer homes. Connect all four wires to the new switch in the same order they were connected to the old one. Take a photo before you disconnect anything so you do not mix them up.

Can I put the old dimmer back if I change my mind?

Yes. The process is identical — turn off the breaker, disconnect the three wires from the regular switch, and reconnect them to the dimmer in the same order. You can swap back and forth as many times as you want.

Will a regular switch work with LED bulbs?

Yes. A regular switch straightforward turns power on or off, so it works with any type of bulb. LED bulbs will not flicker or hum with a regular switch the way they sometimes do with a dimmer.

What is the difference between a single-pole and three-way switch?

A single-pole switch controls a light from one location. A three-way switch is one of two switches that control the same light from two different locations (like a hallway light controlled from both ends). Check your old dimmer packaging or the back of the switch itself — it will say which type it is. Buy the same type to replace it.