What usually causes this?
Tripped breaker or GFCI
The simplest explanation. A tripped GFCI can take out outlets in several rooms.
Lost service leg
Homes receive two 120-volt legs. If one fails at the utility, the meter base or a main connection, half the circuits go dark and 240V appliances misbehave.
Loose neutral
A loose service or panel neutral can make some lights brighten and others dim — and can damage electronics.
Failed breaker or bus connection
A breaker that lost contact with the bus bar may look on but deliver no power.
Damaged circuit wiring
A broken connection at one outlet can cut power to everything after it on the circuit.
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.
- Which rooms and outlets are without power
- Whether large 240V appliances work
- Whether lights elsewhere are brighter or dimmer than normal
- Tripped breakers or GFCIs
- Whether neighbors are affected
Warning signs that need a professional
- Lights brightening or dimming in different rooms
- Burning smell or buzzing at the panel
- Electronics failing
- Warm breakers or panel cover
- Partial outage after a storm or tree damage
When should you call an electrician?
If resetting breakers and GFCIs doesn't restore power, call an electrician. A lost leg or loose neutral can damage appliances and may involve the utility's equipment, which the electrician can help identify and coordinate.
Partial outages limited to a single circuit are often a failed connection at an outlet — see no power in one room.
Services that fix this problem
Electrical Troubleshooting
Systematic testing to find the cause of intermittent power loss, tripping, flickering and other electrical faults that aren't obvious.
Electrical Panel Services
Repairs, inspections and maintenance for breaker panels — loose connections, damaged breakers, labeling and capacity checks.
Circuit Breaker Repair
Diagnosing breakers that trip, won't reset, buzz or feel warm — and fixing the circuit problem behind them.
Electrical Meter Services
Repairs to the homeowner-owned meter base, service mast and connections, coordinated with your utility.
Related electrical problems
Frequently asked questions
This often indicates a lost service leg or a failed main connection. It's worth calling your utility and an electrician.
Yes, particularly if it's caused by a loose neutral that creates voltage imbalances. Unplug sensitive electronics.
It can be. Loose connections generate heat. If you notice burning smells, buzzing or unusual brightness, treat it as urgent.