Smoke, flames, someone shocked or a power line down? Call 911 first and stay at least 35 feet from any downed wire.
Urgent electrical problem
Electrical burning smell in the house
A smell of hot plastic, or an odd fishy smell with no obvious source, usually means a wiring connection or device is overheating. If you see smoke or flame, leave and call 911. If not, switch the circuit off and do not use it until it has been checked.
Call availability varies by area and time of day. Calls are routed to an independent electrical contractor. Reviewed .
What to do right now
Smoke or flames: get out
Leave the house and call 911. Do not go back for the panel.
Find the area
Without touching anything, work out where the smell is strongest: an outlet, a switch, a light fixture, an appliance or the panel.
Switch off the breaker
Turn off the circuit for that area. If you cannot tell which, and the panel is not the source, switch off the main.
Do not unplug from a hot outlet
Once the breaker is off and the outlet has cooled, unplug what was connected.
Leave it off and call
The smell fading does not mean the fault has gone. It returns when the circuit is loaded again.
Where the smell usually comes from
| Source | What is happening | Clues |
|---|---|---|
| Outlet | Worn contacts, a loose terminal or a back-stabbed connection heating under load | Warm or discolored cover plate, a plug that is loose or has melted |
| Switch or dimmer | Arcing contacts, or a dimmer running more wattage than its rating | Crackling when operated, a hot plate |
| Light fixture | A lamp of higher wattage than the fixture allows, or baked wire insulation in the ceiling box | Smell appears after the light has been on a while |
| Panel | A loose breaker or a failing bus connection | Buzzing, a warm breaker, scorch marks |
| Appliance or power strip | A failing motor, cord or overloaded strip | Smell follows the appliance, not the outlet |
Why it can smell like fish
Outlets, switches and breaker housings are made from heat-resistant plastics. When these overheat they release compounds that many people describe as fishy or like urine, well before the part chars or melts. A fish smell that comes and goes with no food or drain to explain it should be treated as electrical until proven otherwise.
It tends to be intermittent because the connection heats only when current flows through it. A bedroom outlet may smell only when a heater is running; a kitchen one only when the kettle is on.
What the repair usually involves
- Replacing the device
- The outlet or switch is replaced, not cleaned up. Heat damage weakens the contacts for good.
- Cutting back the wire
- Conductors with discolored or brittle insulation are cut back to sound wire. If there is not enough length, a section of cable is replaced.
- Checking the rest of the circuit
- The same installer wired the other devices the same way, so they are checked too.
- Asking why
- A space heater on an old outlet is a one-off. Scorching at several points suggests the wiring type is the issue; see aluminum wiring repair.
Burning smell questions
The smell went away. Is it safe now?
No. The connection cooled because the load stopped. Keep the circuit off until it is inspected.
Should I call the fire department for a smell with no smoke?
If you cannot find the source, the smell is strong, or a wall or outlet feels hot, yes. Fire departments would rather check with a thermal camera than arrive later.
Can a new appliance smell like burning?
New heaters and ovens can smell for the first few uses as coatings burn off. That smell comes from the appliance, not the outlet, and fades. A smell at the outlet or plug is not normal.
This page is general safety information, not a diagnosis. Electrical faults can cause fire and electric shock. If you are unsure whether something is safe, switch it off and have a licensed electrician inspect it.
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