Checking for WiFi Interference

Checking for WIFI Interference

It is common for WiFi interference in the home or workplace to effect the speed of your internet service.

This is becoming an increasing problem for many people, so it should be one of the first things to check when diagnosing speed issues. In order to determine the cause for this issue there are some basic steps to try before we look at other possible points of the network. This guide will assist you with performing tests you can do to rule out interference and other common problems.


STEP ONE: Speed Testing

The first step is to do a speed test using one of the Ezi-Web Speed Test servers

• Bundaberg –
• Brisbane –

Take a note of what the test results are. These will be your benchmark for when changing settings or performing the below tests.


STEP TWO: Verify if the problem is related to WiFi

Plug your computer directly into the router using a network/ethernet cable, and turn off your Wifi connection. This is the easiest and most reliable method of ruling out Wifi interference.

Perform another Speed test using the same server you did previously. What results do you see? Take notes or make screenshots.

• It’s Better ~ If the speeds improve to what you have experienced prior, there is a good change your problem is WiFi related. The next step would be to look at the cause of WiFi interference. Begin by trying changing the WiFi channel or frequency to work around it. A separate guide for this available here.

• No Change ~ If there was no change when connecting via a network/ethernet cable, your problem is most likely not related to WiFi. Please continue reading this guide on how to diagnose your problem further.

If it isn’t possible to connect to your router using a network cable, please have your WiFi enabled device as close as possible to the router and continue through the following steps.


STEP THREE: Finding a solution to Wifi interference

Before proceeding, it is worth turning off your router for 5 minutes and then turn it back on (if you haven’t done so already). It’s common for consumer grade routers to need a restart every now and then, or after power fluctuations. Also, the router (in its default state) will automatically select the best WiFi channel when turning on. It could potential then choose a channel with interference on it. Read the appropriate guide on how to change it from automatic to a set channel of your choice.

Test you speed again using the same server as previously (either Brisbane or Bundaberg) to check for any improvement. In order to ensure a fair test is being performed, ensure the following:

Turn off any other devices you may have (e.g. game consoles, mobile phones, Bluetooth devices, microwave if running etc.) This will reduce the possibility of interference. There has been many cases these devices causing problems, though mainly with the 2.5Ghz Wifi.

If you have a dual band router (2.4Ghz and 5Ghz WiFi) connect to the other frequency and test again. When viewing your Wifi list you will normally see two signals to select coming from your router. E.g.  Ezi-Web_xxxx  and Ezi-Web_xxx 5G.


STEP FOUR: Change the WiFi Channel

Change the Wifi channel. The router may not be selecting the best channel (frequency). We have guides on how to change the Wifi channels on most routers we supply. You can view these in the Support guides section of the help centre.


If the Problem Persists…

If you are still have problems with your speed and need help – please fill in the form below or email and include what steps you have tried or were unable to do.