What usually causes this?
Loose wire connection
A loose terminal or backstab connection can vibrate and arc.
Worn receptacle
Internal contacts wear out, especially with frequent plugging.
Overloaded circuit
Heavy loads on one outlet can make connections hum.
Damaged plug or cord
The buzz can come from a plugged-in device with a damaged cord.
Aluminum wiring
Aluminum wire on non-rated devices can loosen and arc.
What you can safely check
These details help an electrician find the cause faster. Look and listen only — do not remove covers or touch wiring.
- Whether the buzzing continues with nothing plugged in
- Warmth, discoloration or smell
- Whether it buzzes only with certain devices
- Flickering on the same circuit
- Age of the outlet
Warning signs that need a professional
- Burning smell
- Scorch marks
- Sparks or crackling
- Outlet warm to the touch
- Buzzing that continues with nothing plugged in
When should you call an electrician?
Call an electrician for any outlet that buzzes without a plugged-in device causing it. The outlet and its connections should be inspected and repaired or replaced.
Services that fix this problem
Electrical Outlet Repair
Fixing dead, loose, warm, sparking or scorched outlets — and the wiring problems behind them.
Electrical Repair
Diagnosis and repair of dead circuits, failing outlets and switches, tripping breakers and other everyday electrical faults in your home.
Emergency Electrician
Urgent help for burning smells, sparking, hot panels, water-exposed wiring and sudden loss of power at home.
Electrical Troubleshooting
Systematic testing to find the cause of intermittent power loss, tripping, flickering and other electrical faults that aren't obvious.
Related electrical problems
Frequently asked questions
It can be. Buzzing often means arcing or loose connections, both of which can overheat.
Yes. Test by unplugging it. If the outlet still buzzes, the problem is in the outlet or wiring.
If you can identify it safely, yes. Leave it off until the outlet is checked.