What Causes Flickering Lights and When to Call an Electrician
Flickering lights are unsettling partly because they're ambiguous. Sometimes they're a loose bulb. Sometimes they're a symptom of an electrical issue that needs professional attention. Most homeowners don't know how to tell the difference — which leads to either ignoring something that shouldn't be ignored, or worrying about something that has a simple fix.
Here's how to think through what you're seeing.
Low-Priority Causes Worth Checking First
Before calling an electrician, a few simple possibilities are worth ruling out:
Loose bulb. The most common cause of a single flickering fixture is a bulb that isn't fully seated. Turn the light off, let the bulb cool, and reseat it. This fixes the problem more often than people expect.
Bulb type incompatibility. Some dimmer switches don't work well with all LED bulbs. If you recently switched to LEDs and the flickering started afterward, the combination of bulb and dimmer may be the issue. Not all LED bulbs are rated for dimmer use.
Loose fixture connection. A single fixture that flickers may have a loose wire connection inside the fixture itself. This is accessible without panel work, but if you're not comfortable working with wired fixtures, an electrician can handle it quickly.
Patterns That Warrant More Attention
Flickering that fits these patterns is worth investigating more seriously:
Multiple lights flickering at the same time. If several lights on the same circuit flicker together, the issue is likely in the circuit rather than a single fixture. This could be a loose connection in the circuit's wiring or at the breaker.
Flickering that correlates with a large appliance running. If lights dim briefly when an HVAC system, well pump, or refrigerator starts, that's the motor drawing current at startup. Some dip is normal — it's the startup surge. But if the dip is large or frequent, it may indicate that the circuit serving those appliances is under stress.
Whole-house flickering. If lights throughout the house flicker simultaneously, especially with a wave-like pattern, this can indicate a problem at the utility connection, the service entrance, or the main panel connections. This one shouldn't be ignored.
Breakers tripping in connection with flickering. If the flickering coincides with a breaker tripping, you have both a flickering problem and an overload or fault problem. That combination needs professional attention.
Albuquerque-Specific Context
In Albuquerque's summer heat, HVAC systems run hard and long. It's common to notice more voltage sag when a central air conditioning compressor cycles on during a triple-digit afternoon. If your lights dim noticeably when the AC starts but recover quickly, the cause is often the startup demand on the electrical system rather than a wiring fault.
If the same behavior gets worse over a summer season, or if the lights take longer to recover than they used to, that pattern is worth mentioning to an electrician.
Why Connections Matter
The most serious flickering issues trace back to loose connections — in outlets, in fixtures, at breakers, or at the service entrance. Loose connections cause resistance, and resistance at current-carrying connections generates heat. Over time, heat damages insulation, chars wire, and can create conditions for an arc fault.
This is why flickering isn't just an annoyance. It's occasionally a signal of a connection issue that, left alone, could become a more significant problem. The flicker is the symptom; the underlying connection issue is what matters.
Questions to Ask Yourself Before Calling
- Is the flickering isolated to one fixture, one room, or the whole house?
- Does it happen at predictable times (when an appliance starts) or randomly?
- Has the flickering changed — getting more frequent or more pronounced over time?
- Have you recently changed bulbs, installed new fixtures, or added a new appliance?
Be ready to describe the pattern when you call an electrician. The pattern tells them a lot about where to look first.
When to Call Right Away
Flickering that happens across multiple rooms without a clear cause, flickering accompanied by a burning smell or discoloration near an outlet or switch, or flickering that correlates with repeated breaker trips — these are situations where calling an electrician promptly is the right move. You don't need to wait to see if it gets better.
Request a quote and we can diagnose what's causing the issue.