I have this odd issue with two Insteon on/off switches that are in the same box and side by side, but operate two different lights. They are two-way switches (that is, on/off for a single light and not in a 3-way circuit).

If I turn on Switch A, it turns (its light) on fine. If I turn on Switch B (next to Switch A), it turns (its light) on fine, BUT Switch A turns off. I can then turn on Switch A, but if I turn off Switch B, both Switch B AND Switch A turn off.

I wired a lot of my Insteon switches, but I think electricians wired these.

Could this be a wiring issue? An IoX issue? Where do I start (wiring or IoX), and if it is an IoX issue, how do I debug this?

There's 2 starting diagnostic paths, I'd start with the easiest

• Factory rest and restore each individually. Test again. This is relatively easy to try.

  The writeup makes it sound like they've been in there a while, and I can't imagine how wiring would cause that.. I suppose it's possible.... But- if it didn't do it before and started now, a wiring problem seems unlikely. I've had Insteon switches installed for years and sometimes they "lose it" and need to be reprogrammed. Little is lost if this path is wrong

• If that didn't do it, turn on the event viewer level 3, and do recreates to an ordered script (what you wrote above) so it can be compared to the event viewer results. Post it back here

If both of those yield nothing, then its time to dig them out of the wall

Edited yesterday at 01:45 PM1 day by paulbates

To rule out IoX (your controller), just unplug the PLM temporarily and redo your tests. If things stay the same, then it's not a program.

1 hour ago, ctviggen1 said:

If I turn on Switch A, it turns (its light) on fine. If I turn on Switch B (next to Switch A), it turns (its light) on fine, BUT Switch A turns off. I can then turn on Switch A, but if I turn off Switch B, both Switch B AND Switch A turn off.

I think @paulbates is right that the switches need to be reset. Look up the proper way to reset the switch in the Insteon "manual". What you're describing sound like a direct link has been made for "Switch B" to control "A". Might be odd that B doesn't turn both on, but turns both off. Since the link isn't in the IoX system, but direct connection with the devices resetting them should work. I would remove the devices from IoX, factory reset them, then add them back to IoX. When you add them back to IoX be sure to select the option to remove existing links (even though you factory reset them this is an additional step that the IoX should attempt to remove any links i the device as it adds it to IoX.

If that doesn't work then could be a wiring situation.

A question pops up in the back of my mind: is it even possible to program (link) a switch send an Off command to another switch when turning it On?