Router Burning Smell or Sparks: What to Do Now

Act immediately: unplug and isolate the router

A burning smell, visible sparks, or smoke from a router is a serious electrical hazard. Do not wait to see whether the smell passes. Unplug the router from the wall outlet immediately, then disconnect the Ethernet cables, phone line, or fiber connection if it is safe to do so. If the router is part of a mesh system, unplug the main unit and any satellites that show signs of heat or odor.

Move the router to a non-flammable surface, such as a stone counter or metal tray, and keep it away from curtains, paper, and furniture. Open a window or use a fan to ventilate the room. If the device is actively smoking or you see flames, leave the room, close the door if you can, and call emergency services before doing anything else.

• Unplug from the wall, not just from a power strip or surge protector.
• Disconnect attached cables only if the plug and cable are not hot or damaged.
• Do not touch the router with wet hands.
• Do not place the router in water.

Do not try to repair or reuse a burned router

A router that has produced a burning smell or sparks has experienced an internal fault. The damage may not be visible, and a component that overheated once can fail again under load. Even if the router turns on after cooling, it is not safe to trust. The same logic applies to a router whose power adapter smells hot: the adapter can fail and damage the replacement router.

Do not open the case to inspect or repair the board. Consumer routers contain internal parts that can remain energized and are not designed for user service. If you want to understand the difference between fixing and replacing, see router repair versus replacement. For a unit that caused a fire or smoke event, contact the manufacturer or the CPSC to report an unsafe product.

Check the power adapter, cables, and outlet

Many router smells start in the power adapter, not in the router itself. A failing adapter can overheat, discolor, or emit a sharp electrical odor. If the adapter is warm, cracked, or melted, stop using it. Replace it with a matching unit from the router maker or an equivalent specified by the maker. Do not substitute an adapter with different voltage or polarity; that can damage the router and create a new fire risk.

Also inspect the outlet and power strip. Melted plastic, scorch marks, or a loose fit mean the outlet or strip needs attention. A router that suffered a power surge may show no external damage but can still fail later. If you suspect an outlet issue, stop using that outlet until an electrician has checked it.

Inspect the area for damage and hazards

After the router is unplugged, look around the area where it was sitting. Check the wall plate, nearby cables, and any shelf or cabinet surface for discoloration or melting. Remove anything flammable that was close to the router. Airborne dust and lint can settle inside vents and make overheating worse, so if the router was on carpet or near a dusty vent, note that for your next setup.

If the router is part of a mesh network, inspect every satellite and node. A fault in one unit can place stress on the others. See router overheating symptoms for related warning signs to look for after an electrical event.

Choose a safe replacement based on your network

After a router fire or electrical fault, the safe move is to replace the device before restoring your network. Choose a router that fits your home size, internet plan, and device count. Current Wi-Fi generations include Wi-Fi 6 and Wi-Fi 7; the Wi-Fi 7 explainer notes that Wi-Fi 7 enhances performance across the 2.4 GHz, 5 GHz, and 6 GHz bands, while Wi-Fi 6 added support for the 6 GHz band. A newer standard is useful if you have many connected devices, but it is not the only factor.

Think about whether you need a single router or a mesh system. If one router covered your home before the incident, a similar single router may work again. If you were already using a mesh system or had dead zones, a new mesh setup can improve coverage. For step-by-step guidance, use our how to replace your router article and then check the router buying checklist before you install.

Set up security on the new router before connecting devices. Wi-Fi Alliance states that WPA3 is mandatory for Wi-Fi CERTIFIED devices, so choose a router that supports WPA3 or use the security settings recommended in router security basics.

Prevent future router fires

Most router overheating comes from blocked vents, poor airflow, dust, or an undersized power adapter. Place the router on a hard, open surface and keep at least a few inches of space around the vents. Follow the router placement guide and clean the device regularly. A router that runs cool is less likely to develop a burning smell from an overloaded component.

Use a surge protector designed for electronics to reduce the risk of power surge damage. Avoid daisy-chaining power strips, and never cover the router with cloth, paper, or other objects. If you leave for a long trip, you may unplug the router to remove one risk from an unattended home. For more tips, see how to keep your router cool.

What to pick for your use

Questions

Can I use the router again if the smell goes away?

No. A router that has produced a burning smell or visible spark has likely suffered internal damage. Even if it works after cooling, the fault can return and create a fire risk. Replace the router before restoring your network.

What should I do if only the power adapter smells?

Treat it the same way as a router smell. Unplug it, do not reuse it, and replace it with a matching adapter specified by the router maker. A failing adapter can overheat and damage the router.

Should I call emergency services for a router that smells?

If you see smoke or flames, leave the room and call emergency services. If there is no flame but a strong electrical smell, unplug the router, ventilate the room, and monitor the area. Do not go back to sleep until you are sure the device is disconnected.

Does cleaning a router prevent this from happening?

Regular cleaning, keeping vents clear, and allowing airflow reduce the chance of overheating. They do not repair a router that has already emitted smoke, sparks, or a burning smell. Once those signs appear, replace the unit.

How do I secure the new router after replacing an old one?

Change the admin password, set a strong Wi-Fi password, and enable WPA3 if the router supports it. Wi-Fi Alliance says WPA3 is mandatory for Wi-Fi CERTIFIED devices. If you run a small business, NIST publishes a Small Business Cybersecurity Corner with additional guidance.