Nova Broadband is now a proud member of the Digiweb Group / Solving wi-fi interference problems

What is interference?

Your wi-fi system in your house works using radio waves. Your FM radio goes from 88-108 and each station gets its own slice of the airwaves, for instance RedFM might be on 104.6 and 96FM might be on 96.4. Imagine if both of them were on the same channel? You would hear a garbled mess with bits of each station coming through but neither would be able to get their message across.

Why does wi-fi sometimes suffer from interference?

In your home, your wireless router (wi-fi router) operates on a certain channel. If there are other radio sources (wireless routers, baby monitors, video senders, wireless CCTV, cordless phones, etc) operating in your house (or your neighbours’) on the same channel, they can drown out your wi-fi signal, causing your internet to slow down, as the data cannot get across with the noise blocking it out.

How do I know if I have wi-fi interference?

If your internet is slow, you may have wifi interference. Another common symptom is that the internet works okay when very near the wireless router, but as you move away to other rooms it doesn’t. You can check to see if wi-fi is the problem using the following method (works for most users, some have custom setups):

1) Power off your wireless router (by taking out the DC supply plug from the back)
2) Take the cable out of the WAN/Internet port (usually a blue port)
3) Plug this cable into a laptop, wait 30 seconds
4) Test your internet speed without wi-fi

If it is fast without wi-fi and slow with wi-fi then the wi-fi is the problem! This means you either have wi-fi interference (most likely by far) or a faulty router (rare).

How do I sort this out? I don’t want to be stuck to a cable all the time!

Put simply, if your wi-fi has interference on a certain channel, you should try other channels, as follows. Note these instructions are for a Nova-supplied TP-Link router. Other models vary (do some Googling to find directions.)

1) In your web browser, type into the address bar (where you normally see and hit enter. You should be asked for a username and password. If not, try
2) Give a username of admin and password of admin, hit enter. If these don’t work, use the password on a label under the router
3) In the menu go to Wireless
4) Change the Channel dropdown to 1 and click Save. If prompted to do a reboot, then do the reboot. Your devices (PCs, smartphones, etc) might need a reboot also.
5) Test to see if the problem is resolved. If not, repeat the procedure trying channels 6, 11, 4 and 8 in that order

None of this helped?

You may have a faulty router. Please contact our tech support. Unfortunately in some highdensity areas, there may not be any channels available.

Posted in: Technical FAQs