Flickering lights are trying to tell you something, and the first question is scope: one fixture, one room, or the whole house? The answer points to completely different causes.
Here is how to read the pattern, what you can safely check, and when flickering means call now.
Read the Pattern
Flickering in one fixture usually means the fixture: a loose or failing bulb, a dying dimmer, or a loose connection at that fixture. Flickering in one room points to that room's circuit. Flickering across the whole house points to the panel, the service entrance, or the utility feed — and that is the one to take seriously.
Flickering that pulses with a rhythm, or lights that dim severely and stay dim, also point to the service side rather than a single fixture.
The AC Connection
The most common flicker complaint in West Palm Beach: the lights dim briefly every time the AC compressor starts. The compressor draws a large inrush current at startup, and that momentary voltage dip shows up in the lights.
A slight, brief dim is common. But if it is getting worse, or if lights flicker continuously while the AC runs, the electrical supply is straining — an older or nearly full panel, a loose neutral, or an undersized service. Do not open the panel to check; call us and we will test it safely.
Safe Checks
Try a different bulb — preferably a known-good one — in a flickering fixture. If the fixture is on a dimmer, check whether the dimmer is rated for the bulb type; mismatched dimmers and LEDs are the number-one cause of single-fixture flicker.
Beyond that, stop. Flickering caused by loose neutrals or failing service connections is not a homeowner fix, and it can damage electronics and appliances while you wait.
When to Call Now
Call immediately if flickering affects the whole house, if lights dim severely or go nearly out, if you smell burning, or if flickering started after a storm. Whole-house flicker can indicate a loose service neutral — a utility-side problem that needs prompt attention.
We test the panel, the service entrance, and the affected circuits, and we coordinate with the utility when the problem is on their side of the meter.
Common questions
Is it normal for lights to dim when the AC starts?
A slight, brief dim is common — the compressor draws a big inrush current. But worsening or continuous flickering means the electrical supply is straining and worth a professional check.
One light flickers but the rest are fine. What is it?
Usually the bulb, the dimmer, or the fixture connection. Try a known-good bulb first, and check that the dimmer matches the bulb type.
Can flickering lights damage my electronics?
Voltage fluctuations from loose neutrals or failing service connections can damage sensitive electronics over time. Whole-house flicker is worth a prompt call, not a wait-and-see.
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