Flickering Lights in San Diego: When It's Normal and When to Call an Electrician

Flickering lights range from a $12 dimmer swap to a $4,000 service repair. The trick is telling them apart before you spend money — or before something melts. Here's the plain-English version we walk customers through on the phone.

The 5-second triage

• —One bulb flickers → almost always the bulb or fixture
• —One room flickers → usually the dimmer or a loose device in the room
• —Multiple rooms flicker at the same time → circuit-level issue, get it looked at
• —Whole house flickers, especially when a big appliance turns on → possible loose neutral (urgent)
• —Lights briefly dim across the whole street → SDG&E, not you

The harmless causes

LED + old dimmer mismatch

Most LED flicker in San Diego homes traces back to a modern LED bulb on a decades-old incandescent dimmer. Swap the dimmer for a Lutron Diva LED+ or Caseta and the flicker vanishes. Cost: $40 in parts, 20 minutes.

Loose bulb or fixture socket

Coastal air in Ocean Beach, Pacific Beach, Point Loma, and Coronado corrodes light sockets faster than inland. If one fixture flickers and no others do, unscrew the bulb, look for a green tint on the base, and reseat or replace.

The 'call today' causes

Lights dim hard when the AC or dryer starts

A brief dip is normal (motor inrush). Deep, sustained dimming across the whole house — where the fridge lights visibly drop for a second every time the compressor cycles — often means an undersized service, a loose lug in the panel, or the start of a failing main breaker. That's not a wait-and-see.

Multiple rooms flicker at random

If lights on separate circuits flicker together, the common point is upstream — the main panel, the meter, or the service drop. Loose connections in any of those spots run hot, and hot connections are how house fires start.

What to tell the electrician on the phone

• —One bulb, one room, or the whole house?
• —Does it happen when a specific appliance turns on?
• —Are the affected lights all LED, all incandescent, or mixed?
• —Any burning smell or warm cover plates? (that's an emergency)
• —How old is the panel — and is it Zinsco, FPE, or Pushmatic?

What a diagnostic visit usually costs

In San Diego, a proper flicker diagnostic — meter voltage readings on both legs under load, IR scan of the panel, tightening of lugs, and identification of the fault — typically runs $185 to $325 for the trip and troubleshooting. The actual repair (dimmer swap, breaker replace, service tighten) is quoted after. Call 951-545-8822 for a same-day slot.