Possible causes
- Loose connection
- Overloaded device
- Breaker issue
- Dimmer or fixture incompatibility
- Arcing
Safe checks before you call
- Note where the sound is coming from without touching equipment.
- Stop using the affected switch, fixture or outlet if safe.
- Do not remove covers or open a panel to locate the sound.
Professional assessment: A professional can safely trace whether the sound comes from a device, fixture, circuit or panel.
When it may be urgent
Call promptly if buzzing comes from a panel, is paired with heat or odor, or starts suddenly.
FAQs
Is buzzing from a dimmer normal?
Some dimmer and bulb combinations hum because they are incompatible. Note the bulb and dimmer models without removing covers, and ask for a compatibility and wiring check. Stop using the control if there is heat, odor, sparking, flickering or a new loud buzz.
Is panel buzzing serious?
It can be. Panel noises should be evaluated by a qualified professional.