Hearing an Electrical Hum or Buzz? Here’s What to Do

Have you ever noticed a low, persistent humming or buzzing sound in your home? If so, you may be experiencing an electrical issue. While some electrical hums are normal, especially when in use, a continuous noise could be a sign of something more serious.

Letting the problem go unaddressed could lead to further complications and even pose a safety risk. In fact, according to the National Fire Protection Association, fire departments respond to an estimated average of 46,700 home fires caused by electrical failures each year.

Don’t wait until it’s too late—read on to learn what you can do if you hear an electrical hum or buzz in your home.

Common Causes of Electrical Sounds

Before you can take action to address the issue, it’s important to understand what may be causing the sound. Some common reasons for electrical humming or buzzing noises include: 

Loose or Faulty Electrical Wiring

If electrical wires are not properly secured or damaged, they can vibrate and emit a humming noise. This could be due to natural wear and tear, poor installation, or animals chewing on exposed wiring.

Overloaded Circuit

An overloaded circuit can cause a buzzing sound as it struggles to handle the excess electrical load. This could happen if you have too many appliances or electronics plugged into one electrical outlet.

Electrical Appliances and Devices 

Some household appliances—like refrigerators, electrical transformers, and light bulbs—naturally produce a low humming sound when they operate. While these sounds are to be expected, a sudden change in volume or tone could indicate a problem.

Electrical Panel or Circuit Breaker Issues

A buzzing noise coming from your electrical panel or breaker box could signal a serious issue. It might indicate malfunctioning equipment, loose connections, or overloading, which could lead to an electrical fire.

Steps to Take If You Hear an Electrical Hum or Buzz

If you hear an unusual electrical sound in your home, follow these steps to address the issue: 

Step 1: Identify the Source of the Sound

Start by trying to determine where the sound is coming from. Is it coming from a specific appliance or outlet? Is it louder in certain rooms or areas of your home? Identifying the source helps you assess whether it’s an isolated issue or part of a larger problem with your electrical system.

Keep in mind that electrical sounds can be tricky to locate because vibrations may travel through walls or ceilings. Use a process of elimination by unplugging appliances or turning off circuit breakers one at a time to see if the sound stops.

Step 2: Turn Off the Power

Once you’ve identified or narrowed down the source, prioritize safety by turning off the power. Head to your circuit breaker panel and switch off the breaker connected to the area or device making the noise. If you’re uncertain which breaker to turn off, consider shutting off the main power to your home as an added precaution.

Turning off the power not only stops the noise but also prevents potential hazards, such as electrical fires or shocks. Never attempt to inspect or handle electrical components while the power is still on.

Step 3: Inspect the Area

After ensuring the power is off, carefully inspect the area or device emitting the noise. Look for visible signs of damage, such as frayed wires, scorch marks, or melted insulation. Check for unusual heat around outlets, switches, or the electrical panel, which could indicate overheating components.

If you’re inspecting appliances, check for loose connections or parts. Be cautious and avoid touching exposed wiring or damaged components.

Step 4: Call a Professional Electrician

If you’re unable to identify or resolve the issue—or if you notice signs of serious damage—it’s time to call a licensed electrician. Electrical work requires expertise, and professionals have the tools and knowledge to diagnose and fix problems safely and efficiently.

An electrician can inspect your wiring, repair faulty components, and ensure your electrical system meets safety standards set by the National Electrical Code. They may also recommend upgrades or preventative measures to avoid future issues.

Preventative Measures to Avoid Electrical Humming or Buzzing Noises

To reduce the risk of electrical noises and potential hazards, consider these preventative steps:

• Schedule regular electrical inspections: A professional inspection can catch issues early and ensure your system is in good condition.
• Maintain appliances: Keep appliances in proper working order and address any unusual noises promptly.
• Avoid overloading circuits: Spread out your electrical usage and avoid plugging too many devices into a single outlet.
• Upgrade outdated wiring: If you have an older home, consider upgrading your wiring to meet modern safety standards and support increasing electrical demands.

Final Thoughts

Electrical humming or buzzing sounds are more than just a nuisance—they can signal serious problems with your home’s wiring or appliances. By addressing these issues promptly, you can protect your home and ensure the safety of your family.

Ready to address your electrical concerns? The team at McNorton Mechanical has you covered. Our licensed electricians can help diagnose and fix any issues with your electrical system.

Contact us today for expert assistance and peace of mind.