Electrical Panel Buzzing Noise? Here’s What It Means

A Portland Homeowner’s Guide to Buzzing Breaker Panels

A buzzing or humming sound coming from your electrical panel is not normal. While some faint noise can occur under load, persistent buzzing may indicate a loose connection, overloaded circuit, or failing breaker.

At Smiley Electric, Inc., we diagnose panel and breaker issues throughout Portland, Beaverton, and Hillsboro.

Common Causes of a Buzzing Electrical Panel

• Loose breaker connection
• Overloaded circuit
• Failing breaker
• Arcing inside the panel
• Improperly installed breaker
• Outdated or deteriorating panel components

Electrical buzzing often means electricity is not flowing smoothly. In some cases, this can lead to overheating.

Call Immediately If You Notice:

• Burning smell near the panel
• Warm or hot breaker box
• Flickering lights
• Breakers tripping repeatedly
• Crackling or popping sounds

These symptoms may indicate arcing or loose wiring, which can increase fire risk.

What You Can Safely Check

• Listen closely to identify which breaker area is buzzing
• Check for recently added high-load appliances
• Look for visibly loose breakers (without touching internal wiring)

Do not remove the panel cover or attempt internal repairs. Electrical panels contain live components even when breakers are off.

Our Panel Diagnostic Process

• Full panel inspection
• Breaker seating and connection check
• Load and voltage testing
• Identification of arcing or loose wiring
• Upfront pricing before repairs
• Code-compliant repair or panel upgrade if needed

We determine whether the issue is a simple breaker replacement or a deeper panel concern.

Hearing a Buzzing Noise From Your Panel?

If you’re in Portland, Beaverton, or Hillsboro and your electrical panel is making unusual noises, schedule a professional inspection today.

Smiley Electric, Inc.

Licensed & Insured

Oregon CCB #227116