Why do my lights keep flickering?

Q: How much does it cost to fix lights flickering?

$150–$900. A service call to diagnose and tighten connections is at the low end. Panel repairs, breaker replacement or rewiring a circuit run higher.

Q: Can I fix lights flickering myself?

There are some safe steps to try first. Call an electrician for flickering across multiple rooms, any warmth or discolouration at outlets, any burning smell, or buzzing from the panel.

Short answer

One flickering fixture is usually a loose bulb or a dimmer that doesn't match the bulb type. Flickering across multiple rooms is a different matter — that can indicate a loose connection at the panel or main service, which is a genuine fire risk and should be inspected by a licensed electrician rather than lived with.

Urgency: Urgent
DIY: Call a professional
Typical cost: $150–$900
Time: 1–3 hours for diagnosis and common repairs

Urgent — days matter

Escalate if flickering affects multiple rooms, comes with a burning smell, warm outlets or switch plates, or buzzing from the panel. Those signs warrant shutting off the affected circuit and calling an electrician immediately.

What's happening

Voltage to the fixture is fluctuating. The important question is whether the cause is local to one fixture or shared across circuits.

Most likely causes

01
Loose bulb or bad fixture connection
The simplest explanation and the first to rule out.
02
Incompatible dimmer
LED bulbs on an older dimmer designed for incandescent bulbs flicker very commonly.
03
Large appliance startup
A brief dim when the AC or a well pump kicks on can be normal, though frequent deep dimming isn't.
04
Loose neutral or panel connection
Serious. Causes flickering across multiple circuits and is a recognised fire hazard.
05
Utility supply issue
If neighbours see it too, the problem may be upstream of your house.
06
Overloaded circuit
Too much demand on one circuit causes visible dimming under load.

What you can safely check before they arrive

1Tighten the bulb and try a different one
2Note whether it's one fixture or several rooms — this is the critical distinction
3If it's on a dimmer, check the bulb is rated dimmable and compatible with that dimmer
4Notice whether flickering coincides with a large appliance starting
5Touch-check outlet and switch plates on that circuit for warmth — if any are warm, stop and call an electrician

When to call someone

Call an electrician for flickering across multiple rooms, any warmth or discolouration at outlets, any burning smell, or buzzing from the panel.

Who to call

Licensed electrician

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What it should cost

$150–$900

A service call to diagnose and tighten connections is at the low end. Panel repairs, breaker replacement or rewiring a circuit run higher.

Estimates are typical US ranges for orientation. Actual pricing varies by region, home and contractor — always get a written quote.

What happens if you wait

Loose electrical connections generate heat at the fault point. This is a well-recognised cause of house fires, which is why whole-house flickering is treated as urgent rather than cosmetic.

Questions to ask the contractor

Is this a fixture problem or a panel problem?
Did you find any loose or overheated connections?
Is my panel in good condition for its age?
Is anything here a fire risk?

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