It is not common for a meter to produce a humming noise.
We can request a technician to visit your site and inspect the meter. To do this, we require you to formally request AGL to raise a meter investigation service order with your Metering Service Provider, ensuring clear and safe access to the meter. If the meter is found faulty, it will need a replacement and no fee will be charged. You can request this be speaking to our webchat team here.