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What causes WIFI interference – how to improve your WIFI signal and speeds


If you’ve bought the fastest WiFi network adapter and router, and you’re still getting slow data throughput, it could be time to hunt down causes of interference.

1. Microwave Ovens – 64% loss

BEWARE the microwave oven, when using 2.4 GHz networks.  If someone is warming up their cold cup of tea, it’s possible you’ll lose around 64% of your data throughput, within 25-30 foot of the microwave.

Microwave ovens can cause problems up to 50 meters away.. that’s over 150 foot away…  If there’s a kitchen next to your WiFi, then you’re in BIG trouble.

2. Blinking Christmas Lights – 25% loss

Christmas lights can reduce WiFi performance by a quarter.  So as soon as you put up those blinking festive lights, expect WiFi problems.

3. Victorian or Edwardian Houses – Chicken wire walls

In old houses, they used chicken wire to assist in plastering the walls.  Chicken wire is NOTORIOUS!!  This wire is ideally shaped to block all 2.4 GHz waves…  and the only solution is to knock off all the old plaster.

A Victorian house acts as a FARADAY CAGE for your WIFI.

4. Large Mirrors and large fish tanks

Large mirrors reflect and bounce the signal back… often in the wrong direction.

A 4 foot fish tank can have the same impact.    Your signal is “dead in the water”… did you see what I did there?

5. Old TV’s

Old CRT TV’s can destroy the signal for up to 200 meters.  In one case BT bought a gentleman a new TV, as his old TV destroyed their WiFi routers across several streets.  200 meters is over 600 foot…    Any kind of retro equipment can cause this effect.  Luckily BT had the sense to buy new TV’s where their service were impacted.

6. Florescent lights

Yes, it’s true… florescent lights can reduce your WiFi signal.  The impact is nowhere near that of a microwave oven, or your Christmas lights, but it can be measured.

 7. BlueTooth – the New, strong Class 1 version

Bluetooth works on the 2.4 Ghz frequency – and the latest version works over 100 meters.

8. Old Cordless Phones – 50% loss

The type of cordless doesn’t make much difference, they all behave like the Wild West towards your wifi.

***Additional info****

The majority of Microwave Ovens pulse their energy and clash with channels 5, 6 and 7.  The offending channels 5,6 and 7 operate between 2432 and 2442 Mhz, as each channel is approximately 5 MHz.

Occasionally you may find your oven pulses on channel 1 or 11.    Channel 1 starts at 2412 MHz.  Channel 11 means 2462 MHz.

Microwave ovens retain their number 1 spot for popcorn, baked potatoes and burning out your wifi.

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