Problems with Play: 3

[herbgold]

I've recently bought a Play: 3 and installed it in the kitchen to replace a Play: 5, which has found its way to our bedroom. The Play: 3 drops off the network at least once a day. I add it back using "add a SONOS component" and it works for a while before dropping off again.

The Play: 3 is in exactly the same position in the kitchen as the Play: 5, which we never had any problem with. What is the problem, and should I be doing anything else?