Warning signs you need an electrician right away

Why the warning signs matter

When a home's electrical system is working, you don't think about it. When something is wrong, the first clues are often small: a light that flickers, an outlet that feels warm, a breaker you've reset three times this month. It's tempting to live with them. The trouble is that many of these symptoms have the same root causes as electrical fires: loose connections, overloaded circuits and damaged insulation.

We see this across Toronto and the GTA, in post-war bungalows with their original wiring and in newer homes where a renovation added more load than the panel was sized for. Some problems can safely wait a few days for a scheduled visit. Others can't. This guide sorts them out.

Call an electrician now if you notice these

These signs point to heat, arcing or damage somewhere in the system. Turn off the breaker for the affected circuit if you can do it safely, stop using it, and call. Our 24/7 emergency line is (647) 930-2907.

• A burning or hot plastic smell from an outlet, a switch, a light fixture or the panel. This usually means something is overheating: a loose connection, a failing device or wiring that's carrying more current than it should.
• Outlets or switches that are warm, discoloured or scorched. Heat is never normal at a device. Brown or black marks around the plate mean it has already been hot enough to burn.
• Buzzing, crackling or sizzling sounds. Electricity should be silent. A buzz from an outlet, switch or panel often means arcing, where current jumps across a gap.
• Sparks beyond the tiny, brief flash you sometimes see when unplugging something.
• Water near electrical equipment after a leak, a backed-up drain or basement flooding.
• A breaker that trips again immediately after you reset it. Something on that circuit is drawing far too much current or is shorted.

If you see smoke or flames, leave the house and call 911 first. If a power line is down outside, stay well back and call your utility's emergency line: Toronto Hydro in the City of Toronto, or Alectra Utilities in Mississauga, Vaughan and Richmond Hill.

Book a visit soon if you notice these

These are less urgent but still worth having looked at within days or weeks, not months:

• Lights that flicker or dim when the furnace, air conditioner or a large appliance starts. Occasional dimming can be normal on a busy circuit, but regular flickering can mean a loose connection or a circuit that's overloaded.
• Breakers that trip now and then, especially when the same few appliances run together. That's often a sign the circuit, or the panel, has run out of capacity.
• Outlets that don't hold a plug or only work some of the time. Worn contacts make poor connections, and poor connections make heat.
• Mild shocks or tingles from an appliance, a tap or a light switch. This can point to a grounding problem and should be checked.
• Extension cords and power bars everywhere. They're a sign the house doesn't have enough outlets where you need them, and daisy-chained power bars are a common fire risk.
• A fuse panel, or a panel your insurer has asked about. Many insurers now ask about the age and type of panel and wiring before covering an older home.

A diagnostic call is the usual starting point: we trace the fault, explain what's causing it and give you the price to fix it before doing the work.

What usually causes these symptoms

Behind most of the warning signs above are a handful of causes. Knowing them helps explain why the fix isn't always "replace the outlet".

• Loose connections

  Connections loosen over years of heating and cooling, especially on heavily used circuits. A loose connection resists current and heats up, which is where many burning smells start.

• Overloaded circuits

  Space heaters, kettles, air fryers and microwaves on one circuit can draw more than it was designed for. The breaker trips to protect the wire, which is a sign it's working, but also a sign the circuit is overloaded.

• Worn or damaged devices

  Outlets and switches wear out. Cracked plates, loose receptacles and old devices that no longer grip a plug make poor contact and run hot.

• Damaged wiring

  Nails and screws through cables during renovations, rodents in attics and basements, and old insulation that has become brittle can all damage wiring out of sight.

• Moisture

  Water in a basement, an exterior outlet without a proper cover, or a leak above a light fixture can cause faults, tripping and corrosion.

• A panel at its limit

  A panel with no spare spaces, doubled-up breakers or signs of rust or heat is often the common thread behind problems all over the house.

A good electrician fixes the cause, not just the symptom. That might be one tightened connection, or it might be a dedicated circuit for the appliance that keeps tripping the breaker.

Older homes need extra attention

A lot of Toronto's housing is older than the appliances inside it. Homes built before the 1950s may still have knob-and-tube wiring in places. Houses from the 1950s and 60s often have 60 or 100 amp service, sized for a time before central air, induction cooktops and electric cars. Some homes from the late 1960s and 70s have aluminum branch wiring, which needs the right connectors and devices to stay safe.

None of this means a house is unsafe, but it does mean the system has less margin than a modern one. If you've bought an older home, or you're planning a renovation, a full home electrical inspection gives you a clear picture of what's there and what, if anything, needs attention first. If the inspection shows the service is too small for what you want to add, a panel upgrade is usually the fix.

What to do while you wait

• Turn off the breaker for the affected circuit and leave it off.
• Unplug anything on that circuit that you can reach safely.
• Don't open the panel cover or take apart outlets and switches.
• Keep children and pets away from the area.
• Note when the problem happens and what was running. It helps us find the cause faster.

Most of all, don't wait for a problem to fix itself. Electrical faults rarely do, and the repair is almost always simpler and cheaper the earlier it's caught.

Simple checks through the year

You don't need tools to keep an eye on your electrical system. A few habits catch most problems early:

• Test your GFCI outlets in bathrooms, the kitchen, the garage and outside by pressing the test and reset buttons every few months.
• Test smoke and carbon monoxide alarms monthly, and replace them at the age the manufacturer recommends.
• Before winter, check that space heaters are plugged directly into the wall, not into power bars or extension cords, and that the furnace area and panel are clear.
• Before summer, notice whether lights dim when the air conditioner starts. If they do, mention it at your next service visit.
• After a storm, look at the service mast and the wires coming to your house. If anything looks bent, damaged or pulled away, call your utility and an electrician.

Who to call

In Ontario, electrical work should be done by a Licensed Electrical Contractor, who files the permit with the Electrical Safety Authority (ESA) where one is needed. Marrast Contracting is licensed under ECRA/ESA 7016430, and every job is led by a Master Electrician. Read more about why that matters.

Call (647) 930-2907: it's answered any time for emergencies. For everything else, call or send a request and we'll get back to you within 30 minutes during office hours.