Hi!


The obvious is that the modules up there are at the end of their
lives and need tb replaced.

They are so simple that a failure like that would surprise me.

I had a CM11A controller plugged in under my desk for the longest
time, doing absolutely nothing. It wasn't even plugged into a
computer. I'm sure it had been plugged in since the late 90s, and
disconnected from power only when it went out.

I took it over to my other house to use it as a lighting controller
for some of the halloween stuff I had out and it worked just like new
after putting new batteries in it and programming it with a computer.

Anyway...back to your problem. Have you tried putting the controller
and offending modules on the same circuit to see if the bad behavior
persists?

If you are in the US and therefore have two "legs" of 120 volt power
coming in, X10 modules can have a great deal of difficulty with this.
If there isn't some kind of "bridge", the signal has to run all the
way back out to the transformer to cross over to the other "leg". It
may get very distorted in the process or be too weak to do this. I've
seen this cause a module to respond to one command without responding
to another.

Maybe you know all that. I mention it just because it's so easy to
forget about it...or at least I have found that it's easy to forget.

There are other things that can cause problems with X10
communications. Surge protectors (don't plug X10 modules into them)
intercoms that communicate over the household wiring, CFL bulbs, and
switchmode power supplies can all cause problems.

I actually gave up on my X10 stuff at the one house because of
interference. Modules would start coming on or going off--sometimes in
rapid succession--all on their own! Ones that could dim would
frequently do so. I could change the housecode when it started up, and
that would solve it for a while, but whatever it was would eventually
"follow" ... and there it went again!

I never did figure it out. Maybe it was nothing more than someone
being extremely juvenile? The other house (across the street, on a
differen transformer) has never had that problem.

William