Why are my lights flickering? Usually it's a loose connection, a heavy appliance, a problem on the utility's side, or older wiring and service. This post explains how to tell those apart, what you can safely check yourself, and when to call. If you're in Portland and the flicker keeps coming back, we can help track down where it starts.
Why are my lights flickering or dimming?
Most flickering comes from one of a few things, and the pattern helps narrow it down.
- A loose connection, including a loose neutral (the wire that carries current back to the panel)
- A heavy appliance pulling power when it kicks on
- A problem on the utility side, like the transformer or the incoming feed
- Older wiring or an older electrical service
- A worn bulb or dimmer, if only one fixture does it
Pay attention to which lights flicker, when, and what else is running. That detail saves a lot of guessing.
Is it normal for lights to dim when an appliance turns on?
A brief, slight dip when a big appliance starts can be normal. If the dimming is noticeable, comes with flickering, or happens across most of the house, it's worth getting looked at.
Here's a real example. A customer with a small house noticed that most of the light fixtures dimmed when they ran the washer, microwave, electric kettle, or air fryer. The living room, dining room, and bedroom lamps all went a little dim, and a few flickered. It wasn't urgent, but they wanted to know why. They also worried the house didn't have enough power.
From what they described, it sounded like a loose neutral or another loose connection. If most of the house does it, the cause can also sit on the utility side, at the transformer or the incoming feed. Either way, it's a reason to have someone look.
What does it mean if the whole house flickers?
If the whole house flickers, the cause is more likely at the service, meaning where power enters your home, or on the utility's side.
When only one room or one fixture flickers, the problem is more likely local, like that circuit, a connection, or a bulb or dimmer. When most fixtures dim together, we look at the panel and the service connections first. We also want to know whether the utility has an issue on its end.
What can I safely check myself?
If there's no burning smell, heat, sparks, scorch marks, discoloration, or water near electrical equipment, you can do a few harmless things while you wait for an electrician. If you notice any of those, it's an emergency. Call Coy Electric right away at (971) 306-8484.
- Look outside and ask a neighbor if their lights flicker too. If they do, it may be a utility issue.
- Note which appliance is running, which rooms are affected, and how long it lasts.
- Unplug the appliance you suspect and see if the flicker stops.
- If a breaker has tripped, reset it once. If a GFCI outlet has tripped, press its reset button once. If either trips again, call an electrician.
That's the whole list. Anything beyond it is a job for an electrician. Write down what you noticed and tell us when you call.
What will an electrician check?
We start with the most likely spots and work outward. That usually means opening the panel and checking that every connection is tight, then checking the service connections to make sure nothing is loose there.
Going through every wire in the house would take a long time, so we don't start there. We start with the main suspects. If our side checks out, the next step is calling your utility so they can check theirs. Sometimes they find a problem on their end, and that fixes it.
With Coy Electric, you get a straight answer about what we found and what we didn't. The work is explained in plain language before it starts, and you see the price before any work begins.
What if the lights keep going out after a power outage?
If problems started after an outage, say so. The pattern can point to a fault that needs on-site troubleshooting.
Someone running a coffee stand told us the power had gone out about two weeks earlier. Since then, the lights kept going out, and the espresso machine and water pumps would stop working. Every day something new wouldn't turn on. Things sometimes came back, but only for about an hour before shutting off again. The utility had already checked and said everything looked fine on their end.
That's a good example of when to bring in an electrician. When the utility says their side is good and the problems continue, the cause is more likely inside the building.
Does flickering mean I need a bigger panel or service?
Sometimes, but not always. If you have an older electrical service, it's possible. Otherwise, it's hard to say without looking.
Many people worry they simply don't have enough power. That's a fair question, and we can check what your home has and what it needs. We can't promise one fix before we look, because sometimes the cause is just how the existing wiring was done. If an upgrade turns out to be the answer, we'll explain why in plain language before any work starts. We offer electrical service upgrades and panel upgrades, and we handle the permit and inspection process when a job needs one.
When is flickering an emergency?
Flickering is an emergency when it comes with a burning smell, heat, sparks, scorch marks, discoloration, or water near electrical equipment. If you notice any of those, call Coy Electric right away at (971) 306-8484. We offer 24/7 emergency repairs.
If you see smoke or fire, get everyone out of the house and call 911.
Flickering without any of those signs usually isn't an emergency. Schedule a visit soon, especially if it's getting worse, happening more often, or some lights get brighter while others dim.
Get flickering lights checked
The cause might be as simple as a loose connection or as big as a problem at the service, and you won't know until someone checks. Write down what you've noticed, check with a neighbor, and call us. We'll look for where it starts and tell you plainly what we find and what it takes to fix it.
Schedule electrical troubleshooting with a licensed Portland electrician. Call Coy Electric at (971) 306-8484 or request service at https://coyelectric.com/contact.
Oregon CCB #9388
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Published October 22, 2026