Lights Flickering in House? Causes, $100 to $200 Call

From Bob Vila, Lee Company, FPL and LG&E and KU. Flicker with popping, crackling, heat or a smell is never the harmless kind.

Are flickering lights an emergency?

Flickering lights are an emergency when they come with a burning smell, smoke, or an outlet or switch that is hot to the touch: get everyone out and call 911, and the Watch Hill Fire Department says not to spend time searching for the cause. Popping or crackling with the flicker means arcing, Bob Vila says; turn that circuit's breaker off and call an electrician.

• Same day: flicker in several rooms, lights that dim or flash when big appliances start, or about half the house dead. Lee Company says a loose neutral is not a DIY fix.
• Call the utility: lights that stay dim for a long time (FPL says turn off major appliances and call), or flicker your neighbors see too.
• Can wait: one lamp or one bulb. Tighten or reseat it, and use a dimmer rated for LEDs.

Why are my lights flickering

Lights flicker because of a loose bulb, a bulb that does not match its dimmer, a loose connection in the wiring, a big appliance starting, or a problem on the utility's side, according to Bob Vila's guide. Where it happens tells you which. One lamp is usually the bulb or plug. One room points to a switch, outlet or junction box on that circuit. The whole house points to the service.

Bob Vila says flicker with a popping or crackling sound means arcing, which can start a fire. If you hear it, turn off that circuit's breaker and call an electrician.

Lights flickering in whole house

Lights flickering in the whole house usually point to the main service connection or a loose neutral, not a single fixture. Bob Vila lists faulty connections at the main electrical service as the whole-house cause. Lee Company, a home services contractor, says lights that dim or flash when big appliances switch on can mean a loose neutral, and that it is not a DIY fix.

A loose neutral matters because power arrives on two legs. Lee Company explains that losing one leg leaves about half the house dead: the oven will not heat and the central air will not start. If lights flicker in several rooms or half the house goes out, call the same day. The emergency electrician page covers what to do first and what a night call costs.

Lights dimming when AC turns on

Lights that dim for a moment when the AC, refrigerator or dishwasher starts are a brief voltage drop as the motor starts, which Bob Vila says is more common in older homes. The usual fix is a separate circuit for the appliance, installed by an electrician; HomeGuide puts a new dedicated circuit at $250 to $900. If the AC itself is acting up, see AC repair.

Dimming that lasts is different. FPL advises turning off major appliances and calling the utility if lights stay dim for an extended period.

When flickering lights are the utility's problem

Flickering is the utility's problem when the cause is on its lines, such as a branch touching a wire or equipment clearing a fault. LG&E and KU says that when debris briefly touches a line, its equipment shuts off power for a moment to clear it, and asks customers to report flickering that happens often or lasts. Bob Vila adds shared transformers, storms and utility breakers cycling, and notes that flicker from cycling breakers can come just before an outage.

• Neighbors flicker too. Call the utility first, as Lee Company advises when neighbors are affected.
• Lights stay dim. FPL says turn off major appliances and call the utility.
• The damage is on the house. Oncor says the utility owns the pole, transformer and service line, while the customer owns the meter base, conduit and weatherhead, which a private electrician must repair before power is restored.

Electrical burning smell: what to do

An electrical burning smell means get out and call 911. The Watch Hill Fire Department says not to ignore it or spend time looking for the cause, and to ask for the fire department. It lists an outlet that is hot to the touch and flickering or dimming lights as signs that can come before or with the smell.

Once the fire department has cleared the house, an electrician can find and replace what overheated. Ask for the service call fee first; HomeGuide puts it at $100 to $200, and night or weekend rates at $150 to $200 an hour. A breaker that trips again and again after the scare belongs in breaker keeps tripping.

How much does it cost to fix flickering lights

The service call and diagnosis come first; the fix depends on where the loose connection is.

The fix depends on where the problem is: a switch, a fixture or a connection on one circuit, or a larger job when the cause is the panel or the service. See electrical panel upgrade cost for panels and meter bases, light fixture installation for new fixtures, and electrical repair costs for switches and outlets.

Electrical fire statistics

Residential building electrical malfunction fires numbered 23,700 in 2023, with 305 deaths, 800 injuries and $1.5 billion in losses, in the US Fire Administration's estimates. From 2014 to 2023, USFA says these fires rose 2% and deaths fell 19%. Bob Vila, citing NFPA, puts home structure fires involving electrical distribution or lighting equipment at more than 36,000 a year from 2015 to 2019.

US Fire Administration, residential building electrical malfunction fires, 2023 national estimates.

What to ask the electrician

1. What is your service call fee, and does it count toward the first hour?
2. Will you check the main service and neutral connections, not just the fixture?
3. If the problem is on the utility side, will you tell me what to report?
4. What is your license number? The electrician license by state table shows who licenses electricians where you live.

Calls to the electrician line go to an independent company that serves your area and takes this kind of job; how calls work explains the rest. Electrical repairs are one row of the home repair costs table.