>I have two (!) Leviton X10 wall switches that failed the same day in the same
>way - They will not respond to a ON command or ALL LIGHTS ON command. OFF and
>ALL OFF still work as does on/off via local control. Changing housecode and
>unit codes did not help. Neither did trying a different controller or moving
>the controllers location. Any ideas???????
Power and X-10 commands for the wall switches must flow through the load. If
the load is reduced or changed to corrupt either of these, then it won't turn
on. I had a problem similar to yours trying to use a compact fluroescent in
an outside light fixture (controlled by a X-10 wall switch). I couldn't get
it to turn on via X-10, but if it was turned on manually, it would turn off
fine. The wall switch works fine with a 60-watt incandescent bulb.
BTW, the compact fluroescent was one that works perfectly fine with a lamp
plug-in module. In fact, we have had two controlled this way for almost a
year now, and they work flawlessly.
Another possibility is that you added something in the house that attenuates
the X-10 signal. If the wall switch signal was marginal due to load or long
runs, then reducing the signal further could have caused the problem. I just
fixed a computer power supply that was a X-10 sink. Did you add anything
about the time the problem started?