Whenever I use my air conditioner, the internet stops working. As soon as I turn it off, the internet works again...Any reason why this is and what i can do as I work from home and this is causing problems!
Chances are it's some form of RFI (Radio Frequency Interference), but as mentioned above more information is needed. If you work from home, then is this air conditioning in a stick-and-brick house or in an RV? Is it wired internet or WiFi?
To interfere with a broadband RF signal operating in the GHz range is very unlikely. My first stab at it would be to power the router from a battery and show whether it's power or proximity related. Something to investigate would be if it's the wifi or data carrier side of the path that's failing. If the router/modem has status lights or a status pages you can access, observing those during normal operation and during the problem might reveal a clue.