Lights flicker throughout the house

Symptoms

• Lights dim or flicker in multiple rooms at once
• Flickering happens with or without appliances running
• Lights sometimes brighten briefly along with the flicker

Likely causes

• CommonA loose neutral connection at the panel or meterThis can cause voltage to swing across circuits, dimming some lights while brightening others.
• CommonLarge appliances cycling on and offAn AC compressor, well pump, or furnace blower starting up briefly dims lights on the same service.
• PossibleA problem with the utility's service connectionA loose or corroded connection where the utility line meets your house can affect the whole home.
• PossibleAn overloaded main panelA panel running near its capacity can show voltage fluctuation under load.
• Less commonAging or damaged service wiringDeteriorated wiring between the meter and panel is a less common but serious cause.

What to do

1. Note whether flickering happens with specific appliances starting, like the AC or furnace.
2. Check if neighbors are experiencing anything similar, which points to a utility-side issue.
3. Look at your electric meter and the weatherhead connection outside for obvious damage or looseness.
4. Avoid running multiple large appliances at once until the cause is identified.
5. Call your utility company to report the issue if it seems tied to their service.
6. If flickering happens regardless of what's running and utility service checks out fine, the issue is likely inside your panel.
7. Have a licensed electrician check the panel connections, especially the main neutral and ground.

When to call a pro

Call a licensed electrician or your utility company for flickering that affects the entire house, especially if it's paired with buzzing, a burning smell, or your neighbors report the same thing.

Safety