A router normally becomes warm while it is running. That alone does not prove it is overheating. Repeated shutdowns, unstable performance or damaged equipment deserve attention, but the outside temperature felt by your hand is not a reliable internal temperature measurement.
Start with placement and ventilation
- Put the router in an open position with its vents clear.
- Keep it out of direct sunlight and away from heaters.
- Avoid stacking it on a modem, set-top box or other warm device.
- Use the orientation and clearances specified in its manual.
- Use the supplied or explicitly approved power adapter.
TP-Link’s guidance on warm network devices says normal operation produces heat and recommends open, ventilated placement. Its Deco ventilation advice also warns against stacking operating electronics. Check your model’s own instructions because ventilation layouts differ.
Separate normal warmth from a fault
| What you notice | Useful response |
|---|---|
| Warm case, stable connection | Check placement and the permitted operating environment. |
| Dropouts after prolonged use | Compare wired and wireless results and record timing. |
| Router restarts repeatedly | Check power, firmware and support guidance as well as heat. |
| Burning smell, damaged adapter or deformed casing | Stop using the affected equipment and contact support. |
Do not put a router in a refrigerator, cover it with a wet cloth or open the casing to improvise cooling. These approaches can introduce moisture, damage or electrical hazards without identifying the actual problem.
Test whether heat explains the dropouts
Move the router to a suitable ventilated spot and compare behavior under ordinary use. Note whether all devices disconnect, whether the lights indicate a reboot and whether an Ethernet-connected device also loses access. A Wi-Fi-only problem can have a different cause from the router restarting.
Our router placement and interference guide helps distinguish a poor wireless position from a cooling issue. If you are temporarily sharing a connection from a computer, our Windows hotspot guide explains that separate setup.
Use model-specific limits and updates
Check the permitted ambient temperature in the manual rather than applying a universal case-temperature limit. Install only firmware intended for the exact model, hardware revision and region, following the maker’s update instructions.
If the router still restarts in a suitable environment, contact the manufacturer or the internet provider that supplied it. Give them the model, power-adapter details, firmware version and the result of the wired test. Heat is one possibility, not a diagnosis by itself.
Frequently asked questions
Is a warm router automatically faulty?
No. Routers produce heat during normal operation. Check stability, placement and the model's operating limits.
Should I switch it off every few minutes to cool it?
Repeatedly cycling power is not a diagnosis. Improve placement and investigate repeated restarts or instability.
Can I use any spare power adapter?
No. Use the supplied adapter or one explicitly approved for that model's electrical requirements.
Do dropouts prove that heat is the cause?
No. Power, firmware, the internet connection and wireless interference can produce similar symptoms.