Dimmer switches buzzing-Causes and solutions: Updated Knowledge

If you notice that your home has a dimmer or multiple dimmers buzzing, there are several potential solutions. In this guide, we’ll go over these fixes and cover other related topics. Dimmer switches buzzing will be no more a matter.

Dimmer switches- why should they be applied?

#1. Energy-efficient

One of the maximum giant benefits of dimmers switches is they let you manage the power float throughout numerous lighting fixtures reasserts of your home. Dimming an available electric-powered bulb lets you keep as much as ninety-eight percent of your electric strength. You also can witness a widespread reduction down to your power bill.

The manufacturers had prepared the earliest varieties of dimmer switches with the handiest ON and OFF mechanisms. But, with the development of technology, dimmer switches are more excellent progressive in phrases of benefits, style, and design

Additionally, they may be an awful lot greater high-quality than popular electric switches in terms of strength efficiency.

Dimmer switch helps to save energy
Dimmer switch helps to save energy

#2. Ensures the longevity 

Dimmer switches are extraordinarily beneficial in elongating the lifespan of your electric-powered bulbs and LED lighting fixtures. They can lessen the maximum strength factor’s time and subsequently grow the toughness of numerous mild sources.

When it involves electric-powered lamps and chandeliers, dimmers play a super function in improving the power of electrical flow. Your electric-powered bulbs and LED lighting fixtures can last as long as three or four years if you contain dimmer switches.

***Refer to more: LED Lighting Ideas For Living Room: Best lighting ideas 2022

Why are dimmers humming? 

A buzzing sound from the dimmer may mean that you have overloaded its power and maximum power. If the bulbs in your fixture are powerful and you hear a buzzing noise, the problem is overload.

The dimmer switches work by interrupting the alternating current flowing between the controller and the lighting. Rather than dim the light itself, these switches cause the current to oscillate or blink very quickly, making our human eyes feel as if there is less light.

Intermittent current can vibrate an electromagnetic field inside the bulb filament or inside the switch itself, which can cause a hum or buzzing noise.

How does a dimmer work? 

How does a dimmer work? 
How does a dimmer work?

Old-style dimmer switches break the electric current from the regulator to the bulb with a variable resistor. As a result, the bulb appears darker, but more electricity is needed to drive the wind through the resistor. Thus, the resistor can sometimes overheat and cause the electromagnetic field to vibrate, producing a humming noise

More modern dimmers use a solid-state switching mechanism inside the device to turn the network on and off. This happens in one-minute increments as the current changes direction from positive to negative.

The lighting circuit will turn back on as soon as the voltage returns to a sufficient power level; the brightness switch setting dictates this. The brighter the light, the faster the current reconnects after an interruption, supplying the bulb with a considerable amount of energy per second. You will cut off the draft for most of the AC cycle for the dimmer settings.

Why troubleshoot humming dimmers? 

When left on for a long time, dimmers are no more fire hazardous than turned off. Most likely, leaving the dimmer low will not cause any problems. However, there is a risk of fire to be considered with the adjustable bulb and socket. 

If a light bulb is left on for a long time, it may burn out due to the thermal energy it emits when burning. Such a hot bulb can catch fire if it comes into contact with, for example, a piece of cloth, cardboard, paper, etc.

Therefore, while it is safe to leave the dimmer low in most cases, it is crucial to make sure that the light itself is not surrounded by anything, which could catch fire.

How to fix the issue of Dimmer switches buzzing?

How to fix the issue of Dimmer switches buzzing?
How to fix the issue of Dimmer switches buzzing?

#1. Analyze the Cause 

A switch may hum simply because the screw terminals connecting the circuit wire to the switch body are loose. The sound you hear is an audible signal that current flows through metal connections that aren’t firmly in contact. So the first step is to check for loose wires

Turn off the power to the switch, then carefully remove the controller cover and check the screw terminals along the controller’s edges to make sure they are securely attached to the circuit wiring. You may need to loosen the switch mounting screws and pull the switch slightly out of the wall case to see the metal screw terminals.

#2. Checking the power 

Next, you need to remove the screws of the visor before removing the cover from the wall. Then, drag the switch mounting screws before carefully pulling the button out of the box. Do not touch any wires. Use a non-contact voltage tester to verify that each wire is connected to the dimmer to ensure no current. 

This extra safety step is worth taking as there is no chance of something wrong with your PCB by chance. Prevention is better than cure.

#3. Removing the current dimmer 

You’re better off removing the wiring harness from each set of wires placed on the switch. Therefore, it is essential to separate the cable pairs before emptying the drive. As with all aspects of this work, be careful to avoid damaging the wiring when removing the dimmer.

#4. Installing a new one

Finally, it helps to install a new dimmer. Hang the new dimmer by securing it to the old wire, making sure the color matches the cable

Gently pull on the wires to make sure they are securely connected. Loose wiring is a common reason dimmers fail to occur and can present safety hazards. Push the cord back into the wall, turn the power back on, and turn on the dimmer to verify that it’s working.

Install a new dimmer switch
Install a new dimmer switch

#5. Upgrading your dimmer rating 

You may have installed the wrong type of dimmer. In this case, there is a risk that by replacing the dimmer with an identical or similar switch, the problem will persist. 

In this case, you may need to upgrade the item. Let’s take a closer look at this solution. It helps if you choose a darker color with a higher rating. The advantages of selecting a suitable dimmer based on its wattage rating include being less likely to cause a short circuit. 

#6. Low wattage bulbs 

Instead of upgrading your dimmer’s wattage, you can, of course, install low-wattage bulbs. This can prove to be beneficial in many ways. First, it can help you save on energy costs as well as reduce your carbon footprint. Low-wattage bulbs have become increasingly popular in recent times. 

If you are replacing bulbs with bulbs of different wattages, you should know what you are doing. It will also improve overall safety and prevent fire hazards.

***Refer to more: [Expert Choice] Top 7 LED Recessed Lights In 2022 For Your House

Frequently Asked Questions:

Are all dimmers buzzing?

Here’s a fun fact: almost all dimmers hum. When the room is quiet, and the bulb has been dimmed below 50%, place your ear near the dimmer. 

Are noisy dimmers dangerous?

Easy and safe bulb replacement if humming is coming from the bulb, which happens very often. You may need a different bulb if you notice the humming continues even with the new one.

Does the dimmer squeak when the light is blinking?

In addition to the squeak of the switch, your lights may start flashing! Scary stuff and hallucinations, but ghosts are not your problems! The reason for the buzzing and flickering may be due to the use of dimmers of smart bulbs that have built-in dimming. When there is a dimmer in the switch and light bulb, the results are not very pleasant. 

 The wiring of two separate dimmers can collide and cause annoying flickering of the bulbs. Sometimes it can also be accompanied by a humming sound. Since there is a smart chip inside the smart bulb, it does not require an external dimmer.

How long does a dimmer switch last?

You could hope for a suitable dimmer switch to last for a decade or more, but they could go a lot sooner for plenty of reasons, ranging from bad luck to an incorrect installation to the product simply being poor.

Modern dimmer switches offer all sorts of options, including programmable security timers, slave systems, and fully automated intelligent switches. 

What kind of dimmers fits most?

The CL dimmer is designed to be compatible with LEDs. Most experiences with them have been great. They have low-end settings that allow you to get the best possible dimming range. The CL dimmer will remove noise on most brands of LEDs, but not all. 

Low voltage electronic dimmers are designed for capacitive loads such as LEDs. In my experience, an ELV dimmer helps or eliminates noise almost all the time.

Such noises from a newly purchased LED lamp are often surprising and annoying. Persistent buzzing is often perceived as tinnitus, especially in young people. Humming sounds typically occur at 120 Hz. However, even a low humming noise can be very annoying. 


Thus, knowing how to deal with dimmer switches buzzing will make waves to your household! Hope the above information will be useful to you.