What usually causes this?
Loose or corroded connections
Resistance at connections reduces voltage and creates heat.
Overloaded circuits
Too many loads on one circuit cause voltage drop.
Long or undersized runs
Distant outlets and garages fed with small wire experience drop.
Neutral problems
A loose neutral can cause low voltage on one side of the panel and high on the other.
Utility supply
Transformer or service issues can lower voltage to your home.
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 low voltage affects the whole house or specific circuits
- Whether it gets worse when large appliances run
- Neighbors experiencing similar symptoms
- Recent storms or utility work
- Electronics resetting or motors struggling
Warning signs that need a professional
- Some lights bright while others dim
- Burning smell or warm panel
- Appliances failing prematurely
- Frequent flicker
- Humming motors
When should you call an electrician?
An electrician can measure voltage at the panel and on individual circuits, under load, to determine whether the issue is inside your home or on the utility side. Repairs range from tightening connections to adding circuits or upgrading service.
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.
Electrical Meter Services
Repairs to the homeowner-owned meter base, service mast and connections, coordinated with your utility.
Electrical Wiring
New circuits, repairs to damaged wiring and wiring updates for kitchens, additions and major appliances.
Related electrical problems
Frequently asked questions
Most U.S. homes receive about 120/240 volts, with some variation considered normal. Consistently low readings or large swings are a concern.
Yes. Motors in HVAC units, refrigerators and pumps can overheat when voltage is low.
It can be. An electrician can help determine whether the issue is on your side or the utility's.