How to Cool Your Wireless Network Router and Prevent It From Slowing Down





Introduction: How to Cool Your Wireless Network Router and Prevent It From Slowing Down

This is an Instructable showing you how to cool your wireless network router and avoid slowing down.
I used computer's fan to cool the wireless, attach the fan to the wireless and will use the same power source of the wireless (wireless NO fan ON, wireless OFF fan OFF)

Maybe you will ask me why should I cool my wireless network router?
The answer is: by cooling your router you are avoiding slowing down (especially while downloading big files) because if you are using the router too much (such as downloading big files. you can notice that by seeing the LED's in the router) it will get hot, and you know that Electronic devices will not be efficient if it's not working in the right temperature.

Also because I live in a hot country and I am noticing that the heat is affecting the wireless.

Step 1: Things You Will Need

To make this project you will need:

1. Fan (I used Desktop PC's fan).
2. Male jack that is similar to your wireless jack(I found it in an old adapter).
3. Female jack that is similar to your wireless jack.
4. Some glue.
5. you will need to solder some wires.

Step 2: Connecting Wires

As you can see in the pic the center pin in the female jack is the (+) and the other one is the (-)
Connect the red wire in the fan to the center pin in the female jack (+) and the black wire to the other pin (-)
now you should connect the male jack with the fan in parallel (as shown in the pic)
In my case the male jack has two wires inside each other. The (+) wire is in the middle (inner wire) and the (-) wire (outer wire) is surrounding the (+) wire. Separate the two wires and connect them to the right pin
And don't forget to insulate them so it won't be short circuited (I used gun glue)

Step 3: Gluing

Finally, make sure that the power source of the router is suitable for the fan (in my case it's 15 V for wireless and 12 V for fan) it should not be exactly the same.

now connect router's male jack to our female jack, the fan will start and you should notice which side of the fan is sucking and which side is blowing.

Glue the blowing side to the wireless (glue it in a side that has many hols)


I hope you have enjoyed this instructable, if you like it please do it and share the pics.



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i have used Belkin wireless n300 router for more than 4 years and the best thing it it was never slow . but recently it has been slow and router is getting hot . i have used few steps like updating the latest firmware , restart the router once in a day for 5 min . and checkout some setting to speed up your belkin router . follow ans see if this works and speed up your router . thanks

How do I get the fan to start and stop working with the router and should the fan send air in the router or out of it?

1 reply

by following the wiring shown in the picture, the power going to the router will be shared with the fan, so whenever you switch on the power supply of the router, the fan will start. you can do in or out, butter send the air in, it will cool better but will make the router dirty after sometime.

Here is what I did, Parts: 80mm case fan, power switch, usb A connector.

took an old 80x80x25mm case fan and cut off connector soldered it to a switch i used an old one out of one of those window alarms (see in lower left). and soldered a usb A head to it, plug the usb into one of the routers usb ports for power (could of also used a usb port on my STB right next to it or a usb wall adapter), and poof cooler router.

1 reply

What I did

I just plugged in a huge window fan and put it next to my router.

1 reply

works like a charm... ive been doing this for years and I have experienced much faster upload and download speeds as a result of this simple hack. i imagine mounting a fan to your router would create similar results...this is just way simpler for me

I connected two fans and the router in parallel, both fans are 12v ,and router is 9v and powersupply is 9v, will there be any problem because i connected two fans???

2 replies

I assume you are using PC fans, so NO problem at all. The fans won't be running at the max rpm and their torque will be reduced (aka, you can stop the blades easily with no effort), but for cooling a router that's ok. You only concern should be the current: these fans normally need around 100-120mA each, check the power of your router and if your supply can deal with the router+2fans power demands with a 20% of margin, basicly to avoid overheating of the supply over the time. Normally it shouldn't be a problem.

Thanks man! :-) yeah its working all fine :-)

Does the magnet from the fan be able to disrupt signals???

1 reply

It didn't affect my router. Try and update us, have fun!

I bought my own modem with built in wi-fi for Time Warner Cable and it suffered the heat problem as well. I just happened to have a old cracked laptop cooler pad sitting around that had 3 small 5v fans in it and I put two and two together and borrowed the fans from the pad and hot glued them to the large vent hole at the top and it's been puuring like a kitten ever since :) The modem has a built in USB port in the back (not sure what for) but the fans had a USb cord built on so I just plugged them in and it has been working fine for close to a year now. Netgear model CG3000D fyi.

1 reply

Thanks for updating us. I am really happy to hear someone is benefiting! Have fun.

This is bad for the router. It throws off the power supply since its getting less power than its expecting. It would be better to find one of the 5 volt lines and solder it into that so it would just have a bigger draw from somewhere within the circuit. Real wold effectively speaking it doesn't matter and this method is better for an average joe. I'm just a perfectionist though and like everything running at peak efficiency.

1 reply

This would not be bad for the router at all. As long as the power supply can output enough current (power) to run both the fan and the router it will have absolutely no impact on the router.

In fact if you were to attach it to a 5V line within the router this would be far less efficient and more likely to upset the router, depending on how that 5V is sourced. E.g. if the 5V comes from a linear regulator (as is likely) the fan will draw the same amount of current from the 15V supply but will run much slower since the power delivered to the fan is at 5V, not 15V (P=IV). This is why linear regulators are inefficent - the current drawn always stays the same but the voltage drop requires a drop in power which manifests itself as heat in the regulator. This will of course mean that your router is running hotter than it was before, further adding to the inefficiency.

Whats more - if the linear regulator is a low power variant, e.g. a 78L05, then it may not be able to deliver the required additional current demanded by the fan. In this case, depending on the regulator, the 5V may start to droop, or cut out entirely. This could lead to some components within the router shutting down.

If the router is of a higher build standard it may source the 5V from a DC-DC converter. These are much more efficient in that they attempt to convert all of the input power to output power and waste little in heat, generally achieving 90%+ power transfer. This would mean that your router doesn't get significantly hotter, however it will still be less efficient than running it straight from the 15V line (albeit ~90% efficient compared to ~33% of the linear regulator). But the same over current situation as with the regulator still exists.

In short - as long as your power supply can provide PowerOfRouter+PowerOfFan in Watts the method described in this instructable is the most efficient. NOTE: most electronic devices are rated in voltage and current, not power so here are the formulae you need: PowerOfRouter = VoltageOfRouter*CurrentOfRouter and PowerOfFan = VoltageOfFan*CurrentOfFan.

Or.... buy quality equipment in the first place

It looks like you just paralleled the fan into the power supply which would divide the amps, but I don't think it is a problem. I might suggest using an electrical fitting called scotch locks to accomplish the same thing in a simpler procedure. Good idea, I didn't know router heat was an issue.

hey wrx sti, i just got the pix lolz feel free to roflyao

1 reply

nice one, you are doing it in a way that you will keep your router brand new!
But try to keep the fan as close as much to make it as efficient as much.
Please comment your impression after testing it for some time. Cheers