Why Does a Light Switch Make Noise?

Replacing switches can be dangerous without experience and specialized knowledge.

Typically, a light switch will only make a clicking sound when activated. However, there are cases when the switch crackles or pops, indicating a potential electrical hazard.

Here’s why light switches can make strange noises when used.

The basics of a light switch

Light switches are simple to understand. When toggled on, the circuit is completed, and electricity can travel to the light bulb. Toggling the switch off closes the circuit and turns the light off.

While some switches are more complicated, they all work on the same principle. They provide or remove an electrical connection to the light. Electrical flow is necessary for all electronics and home appliances to work; a switch can control this flow.

Why is the switch making sounds?

Home wires are usually insulated against the air to prevent accidents, and light switches are no exception. However, extended use can result in faulty wiring. Typically, this comes in two primary forms. Either the wire insulation is worn, or the lines get loose.

The copper wiring is exposed to the air, and when electricity flows, it escapes through these gaps or holes, causing heat to accumulate. These crackling or popping sounds indicate the currents arcing inside the circuit.

Arcing occurs when currents try to jump over a gap to other wires, and this phenomenon generates heat. In time, a stray current can ignite something flammable or shock a user.

Some switches that have faulty wiring get hot after making these strange sounds. In this instance, turn off the power to these switches.

Potential fixes for crackling switches

Turning the power off is the first step, eliminating the risk of continued arcing and potential damage. Then, contact an electrical expert, who will remove the cover plate and tighten the screws inside. The light switch requires a replacement if the noises persist after this fix. 

When does crackling happen?

Light switches making noises are usually more common in older homes, as these properties have older electrical work that has worn out. However, newer homes can also experience the same problem, mainly if the switch is installed poorly or faulty.

Crackling and popping are typical signs of wear and tear that arise from prolonged use. However, all light switches need replacing eventually, and there’s no reason to panic.

Call a professional for help

Replacing switches can be dangerous without experience and specialized knowledge. Contact a professional electrical company for timely and thorough assistance. 

When you need a licensed electrician for commercial or residential electrical needs, call Zimmerman Electric at 310-378-1323.