I bought the big 12-pack of module a few years back when I went X-10 in my house. Since then I've had several failures, especially in the appliance modules and the light switch modules. Take the light switch module for instance. Typically it will first stop responding to the remote signal intermittently, then eventually it won't respond at all. It will still work in manual mode for a few more months but eventually even that will no longer work. I've researched and found that switch design was a problem, but this one has a soldered on discrete switch and not the assembled one that breaks the leaf most often. I've looked for a blown fusible link/wire on the board to no avail. I've had two of these fail this way.
Next up are the relay-switched appliance modules. They, too, intermittently cease to respond to remote control, but will still cycle on if I turn the appliance off and on manually.
In all cases a new replacement works just fine as soon as it's installed.
So far I've got 2 light switch modules, 3 relay-switched appliance modules, and two wall-plug light control modules that have all failed this way.
Are they worth repairing?
JazzMan