Bought a few used and new SR227 X-10 wall outlet modules. Tested them separately before installing by hookup to a line cord. All was well. Wired them into a duplex outlet box at the end of a run, pigtailed together and they (I think it's only one, actually) started chattering.
I've read X-10 appliance/wall socket module chattering is almost always considered a mechanical issue, but why would they test cleanly one by one and then chatter when in place? This is without a load plugged in. I tested with a floor lamp, although perhaps not without a load in place.
One other difference is that they are installed face down in the basement ceiling but I can't see orientation having much to do with it. They are also set to the same housecode, but that shouldn't matter much. Happens with both an XTB boosted and unboosted mini-controller. Hit ON and you get four rapid clicks from the wallbox.
Any thoughts? I am going to have to unwire them (what a BITCH!!!!!) unless putting a load on the units or some other easier fix makes the chatter vanish on its on.
-- Bobby G.