Jeff, I got the module that you sent back. Thanks again for checking it out!. So, here's what happened: You had it set to housecode P1, so first I set a transceiver to P and tried it on that code. It did not work. Then I set it to my usual housecode, E and tested again. Nothing. I have a lamp module set to E4 that works just fine. I set the chime module to E4 and substituted it in the same outlet that I had the lamp module in. Using a palmpad to test, the first 5 times, pressed E4, nothing.
On about the 6th try, the chime sounded. Then all, subsequent attempts failed.
So, the chime worked one time, and then would not work, using the same housecode and outlet. This is consistent with what I saw before.
Next, I moved the chime module out onto my deck, which has a branch circuit which I know for sure has nothing else plugged into it. Suddenly, the chime module is working! The deck is new and has a new 3-wire branch circuit. Most of the wiring in my house is about 50 years old and most of the circuits are 2-wire, without a ground. I haven't had problems with any other modules that I'm using, but for some reason, it seems that the chime module is not happy with some of the branch circuits. I don't know if the difference is a 3-wire vs 2-wire circuit or if there's some kind of interference on some of the circuits. Any ideas?