JEberhard

Understood. I have dual band units on both phases which all responded appropriately with multiple 4 tap tests originating from different devices. My comment was around the fact I have other powerline only devices on this specific circuit and even tested a spare lamplinc on the circuit with no issues with pairing/communication to the PLM. It was only these two switches that seemed to be affected by the Roomba charger.

Well the 4 tap test worked fine. I started unplugging devices and it turned out to be the Roomba charger. I put the filter link on it and now everything is working as intended. Not sure why it only affected those 2 devices and nothing else on that phase. Anyway, everything is solved and working as expected now.

Thanks, yeah I agree bench testing is the next step, was just hoping for some aha moment that I missed. What I don't understand is other powerline only devices work fine on same circuit, that's what is driving me crazy.

One of the loads is an outdoor fixture with a CFL and the other is an outdoor dual head floodlight with halogens i assume. I removed the CFL bulb but the floods are out of reach on the second floor eve. Currently have 10 devices on the network, 5 dual band and 5 powerline only. Here is the log from linking with the CFL removed. It's less than interesting with no events other than the start and stop commands. Tue 11/17/2020 20:01:23 : Start Insteon Device Linking Mode Tue 11/17/2020 20:01:23 : [LNK-BGN ] 02 64 01 00 06 Tue 11/17/2020 20:02:18 : Stop Insteon Device Linking Mode, Final processing to follow Tue 11/17/2020 20:02:18 : [LNK-END ] 02 65 06 : : Unexpected, ignored (65) Tue 11/17/2020 20:02:18 : [All ] Writing 0 bytes to devices Tue 11/17/2020 20:02:18 : [All ] Writing 0 bytes to devices

Seems this is a common thread but I'm not sure where to troubleshoot next. I installed 2 brand new 2466 toggle switches in a 4 gang box. It has a single power feed that feeds 3 lights and a switched outlet. I cannot for the life of me get either of them to link to the ISY. Here is what we know: The circuit they are on has a newer dual band lamplinc on it that works fine. There are a total of 5 dual band devices throughout the house and 5 other powerline only devices. No issues with any of them. I have factory reset them several times. I see no device communications in the event log. They do communicate with each other and can link and control each other. I installed an older spare powerline only lamplinc on several outlets in the same circuit, including the switched outlet from the same box, and I was able to successfully link and control on every single one of them. I even left it plugged in while trying to link the new switches. No bueno. I also tried just hooking up one switch at a time in case they were conflicting with each other. No change. I have tried both manual and auto linking with no change. Anything left to try other than maybe bench testing them? What are the chances that 2 are defective. Just find it odd I can get other powerline only devices to work on the circuit except for these two. I'm running 4.8.0 UI/firmware on the ISY.