Should I call an electrician for flickering lights?

Flickering lights are worth taking seriously — while sometimes caused by something simple, they can also signal a dangerous wiring problem that needs professional attention.

The first thing to check is whether the flickering is isolated to one fixture or happening throughout your home. A single flickering bulb is usually just a loose bulb, a failing LED driver, or a dimmer switch that's incompatible with your bulbs — all minor issues you can troubleshoot yourself. But if multiple lights are flickering, or if the flickering is happening across different rooms or circuits, that's a red flag that points to something deeper in your electrical system.

When flickering lights become a serious concern, watch for these warning signs:

• Flickering that happens when you run large appliances (washing machine, microwave, AC)
• Lights that dim noticeably and then brighten back up
• Flickering accompanied by a burning smell or warm outlets/switches
• Flickering in an older home with knob and tube wiring or a Federal Pacific panel
• Breakers tripping at the same time as the flickering

These symptoms can indicate loose connections, overloaded circuits, or a failing main panel — all of which are genuine fire hazards. Loose neutral connections in particular are known to cause house fires and can be difficult to detect without professional testing equipment.

In Ottawa homes specifically, flickering lights are a common complaint in houses built before the 1980s, where aging wiring connections have loosened over decades of heating and cooling cycles. If your home has aluminum wiring (common in Ottawa homes built between 1965–1975), flickering can indicate oxidation at connections — a known fire risk that the Ontario Electrical Safety Code addresses with specific repair requirements.

What you should do right now: If the flickering is minor and isolated to one fixture, try tightening the bulb and swapping it out. If it persists, or if you notice any of the warning signs above — especially a burning smell — shut off the affected circuit and call a licensed electrician. A burning smell combined with flickering is an emergency: shut off your main breaker and call immediately.

For a proper diagnosis, an ESA-licensed electrician will check your panel connections, test circuit loads, and inspect wiring at the affected fixtures. This kind of inspection typically runs $150–$250 for the service call in Ottawa, and it's well worth it for peace of mind. If you'd like Electrical Ottawa to take a look, we offer free estimates and 24/7 emergency service for Ottawa residents.