Electrical fires cause tens of thousands of house fires every year, and most give warnings first. The tricky part: some symptoms are benign, others are urgent. Here are the eight signs, sorted by how fast you should act.
Burning smell with no source — plastic or "fishy" odor near outlets means insulation is cooking inside a wall; kill the circuit and call an electrician today. Warm or discolored outlets and switch plates — heat means resistance, resistance means a failing connection. Buzzing or sizzling from outlets, switches, or the panel — electricity should be silent.
Breakers that trip repeatedly on the same circuit — the breaker is doing its job, but something (overload, short, failing appliance) keeps asking it to. Lights that dim when appliances start can be normal on big motor loads, but whole-room flickering that persists means loose connections. Two-prong outlets and no GFCIs in kitchens/baths — your protection is decades out of code.
Frequent bulb burnouts in the same fixture (overheating or voltage issues), extension cords as permanent wiring (a symptom of too few circuits), and any home with aluminum branch wiring (mid-1960s–70s) or knob-and-tube — both are insurable and fixable, but need a licensed electrician’s assessment. A whole-home electrical inspection runs $150–$400 and is the best money an older-home owner can spend.
Outlet or switch replacement: $75–$200 each. New circuit: $250–$900. GFCI protection for kitchen/baths: $200–$600. Panel replacement: $1,800–$4,000. Whole-home rewire: $8,000–$20,000+ (see our rewiring cost guide). Electrical is licensed-trade territory in essentially every state — this is not the category to bargain-hunt on Craigslist.
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Get 3 Free QuotesBurning smells, warm outlets, and buzzing from the panel — all mean active overheating. Kill the affected circuit and get a licensed electrician out same-day.