Techman

The applianceLinc is a single band device. They were discontinued some time ago. "Cannot determine Insteon Engine" means that the PLM cannot communicate with the device. Either the device has failed or you have a communication issue. You can replace it with a dual band on/off module

You don't want to delete the old device, just move it from the folder to the main tree. Once it's in the main tree you should install the new device, then in the old device click on replace with and point to the new device. The controller will reboot and the old device will be gone.

First you have to remove the device from the folder, then you'll see the Replace with option. When you replace a device it must be like for like.

@Brian H I sent a message to Insteon support re: the new PLM's, here's the answer I received: "The newer PLMs are still under development. I don't have an ETA to share at this time."

In the admin console you can use HTTPS://eisy.local:8443/desc which will use your original user name amd password

Here;s the latest update from Insteon Passcode Required - Zoom Passcode: 78&YPnWK

Have you tried a Synchronize in UD Mobile. In the home screen, click on the 3 dots in the upper right.

@someguy Do you have any Insteon motion sensors installed? Do the lights all come on at the same time? If you look at your EISY log do you see any activity just before the light(s) come on Do you have any older, non dual band insteon devices, in your system? Do you have any power supplies plugged into your a/c outlets Did you look at your program summany page to see if any programs ran at the time your light(s) came on?

if you still need a range extender any plug-in dual band device will work. If you have numerous dual band devices in your Insteon network then there's probably no need for a range extender as all dual band devices also act as insteon repeaters.

Once your favorites are restored it's time to make a UDM backup

@MTellevik You may want to check your netural and ground connections on the KPL. Being that the issue only happens when the load is increased points to a possible bad connection

What type of load is conected to the switch? Is the switch a dimmer or on/off model?

If you have Zwave something like this might work http://www.empers.com.tw/ZC120_485.html

The Insteon LED Bulb automatically enters linking mode every time it is powered on, it's possible to accidentally link a device to the LED Bulb in the brief period of time that the Bulb is in linking mode. Because the LED Bulb lacks a set button, there is no manual way to factory reset the LED Bulb. You can try removing the bulb from the socket, replacing it and then doing a restore device It's also possible that the electronics in the bulb have failed

Creating a Topology report will give you all device addresses and lots of useful additional info TOOLS | GENERATE TOPOLOGY