Short answer
Yes, it can. Warmth is normal for a router, but if a router gets too hot, its processor or wireless chips may become unstable. People then see slow speeds, Wi-Fi dropouts, or a router that freezes or restarts on its own (see why your router keeps going out for other causes). Heat is only one possible cause of those symptoms, though, so it is worth ruling out other explanations as well.
Is it normal for a router to feel warm?
Yes. Routers dissipate heat as they work, and many are designed with vents or use the case itself as a heat sink. A router that is warm to the touch is usually fine. A router that is too hot to keep your hand on comfortably, or that is hotter than it used to be, is worth investigating. Manufacturers publish operating temperature ranges in their specifications, so check your model’s documentation.
How heat can affect performance
- Slower speeds. Some devices reduce their processor speed when they get too hot to limit heat, which can make traffic handling slower. This is commonly called thermal throttling, and whether a given router does it depends on the design.
- Wi-Fi dropouts or unstable connections. Overheating components can behave erratically, leading to dropped connections.
- Freezes and spontaneous restarts. In more serious cases, a router may lock up or reboot.
- Shorter lifespan. Running hot for long periods can contribute to earlier hardware failure.
Signs your router may be overheating
- The case feels very hot, especially compared with when it was new.
- Problems get worse on warm days or in the afternoon, and improve after a restart or cooling off.
- Random restarts or lights that change behavior.
- Vents are covered in dust, or the router sits on a soft surface or inside a cabinet.
Common causes
- Blocked vents and dust. Dust buildup restricts airflow.
- Tight, enclosed spaces. Cupboards, closed media units and drawers trap heat.
- Soft surfaces. A router on a sofa, bed or thick carpet can have its vents blocked.
- Direct sunlight or nearby heat sources. Windowsills, radiators, game consoles and stacks of other electronics add heat.
- Stacking equipment. Placing modem, router and other devices on top of each other limits cooling.
- A hot room. Summer heat in lofts, garages or small closets can push temperatures up.
- Age or a failing unit. Older equipment may run hotter.
How to cool a router down
- Move it to open space. Place it on a hard, flat surface, preferably off the floor and away from walls and clutter.
- Keep vents clear. Do not place items on top of it or cover it. Leave space around it.
- Clean gently. Unplug it, then use a soft brush or a can of compressed air held at a distance to remove dust from the vents. Do not open the case unless you are experienced, and never use liquids.
- Avoid sun and heat sources. Move it away from windows, radiators and other hot electronics.
- Separate stacked devices. Give the modem and router some air between them.
- Consider a stand. A vertical or raised stand can improve airflow on models designed for it. Only use cooling accessories that are suitable for networking equipment.
- Check the power adapter. Use the adapter that came with the device. A mismatched adapter can cause problems, though that is a different issue from heat.
If the router is still hot after these steps, contact the manufacturer or your provider about a replacement, especially if it is under warranty or supplied by your provider.
Where to put your router for best results
Heat is only one factor. For both cooling and coverage, a central, open, raised position works well in many homes, away from thick walls and large metal objects. Hiding it in a cabinet may help the look of a room but can hurt both temperature and signal.
Could it be something else?
Slow internet has many other causes, including provider congestion, interference, too many connected devices or an old router. If the slowdown follows a time-of-day pattern rather than temperature, see why Wi-Fi slows or drops at night. A router that feels hot and also draws noticeable power may be worth measuring, as explained in how many watts your modem and router use.
Restarting temporarily clears many issues, but it is a workaround. If you find yourself restarting regularly, look for the cause. For the question of whether to switch it off overnight to rest the hardware, see whether you should unplug your router at night.
When to be cautious
If a router smells of burning, has a swollen or deformed case, makes unusual noises, or is hot enough to be uncomfortable to touch, unplug it and stop using it. Contact the manufacturer or provider for a replacement.
Frequently asked questions
Can a router overheat? Yes, particularly if vents are blocked, it sits in an enclosed space, or the room is hot.
Do routers speed up your internet? A router does not make your plan faster than what your provider delivers, but an outdated or struggling router can be a bottleneck (see how to tell if your router needs an update), and a well-functioning one lets you get the speeds you pay for.
Where is the best place to place my router in my house? Generally a central, open and raised spot with good airflow, away from heat sources and large obstacles.