@DcMasta,

For Deco Networks, it is not currently possible to change the channels used by the network, as the network is supposed to choose the frequency that will provide the best connection. However, given that all of your Decos are hardwired, I would expect that the wireless backhaul would not be created, or would cause minimal interference due to no data passing through it.

I do not think that you would want to disable the backhaul feature, as it does operate as a failsafe for if your switch or hardwired connections are interrupted. According to another thread, the hidden network is not used when an Ethernet backhaul is in effect, and would not cause interference with the main network(which I would presume as being from less interference)

What I would recommend doing, is finding a wi-fi analyzer app on your phone to see if there are any other sources that could be adding to the interference that your controller is seeing. Another option would be to try and get all of these devices active and select the optimize option from the deco app. If the devices provide enough interference, your deco may automatically choose another frequency to use.