I’ve had a LZW30-SN switch for years that worked fine. Yesterday Home Assistant showed a firmware update for it that I tried to install but failed.
This resulted in the switch showing as dead in Home Assistant zwave JS, and now I’m stuck even trying to get it paired.
So far I’ve tried:
Excluding the device
Re-pairing the device by pressing the button three times
Deleting the device from Home Assistant then pairing again
Factory resetting the device by pressing the button for 20 seconds
Now I have a factory reset device, and it still won’t pair. I enter add device mode in HA, then press the config button three times. The light flashes, and HA immediately says it failed to add the device. There’s no useful errors showing in the log:
2026-03-2606:26:33.764 CNTRLR Starting inclusion process with strategy Default…
2026-03-2606:26:33.788 CNTRLR The controller is now ready to add nodes
2026-03-2606:26:43.853 CNTRLR [Node 040] Timed out while waiting for a response from the node (ZW0201)
2026-03-2606:26:45.197 CNTRLR [Node 015] Timed out while waiting for a response from the node (ZW0201)
2026-03-2606:26:57.165 CNTRLR Adding the node failed
Thanks for the reply. I gave the zwave exclusion a shot somewhere before step 4 when I factory reset the device. The device was also deleted from Home Assistant.
Attempting to pair it pretty much immediately gives a failure message in HA. If I try testing the zwave strength on the switch (press and hold the config button until it shows green), I get a red light even though there’s another zwave device in the same room that has no problem talking to HA.
I just tried excluding it again. When I tap the config button three times, HA immediately shows “removing device”, but the switch just keeps blinking blue and then eventually shows a red LED.
I tried pulling the air gap then pairing again, and HA immediately shows an error saying it failed to pair and to check the logs (which have nothing useful).
Yeah, I’m pretty sure it will flash green when you successfully do a general exclude.
It’s weird that a firmware upgrade was suggested. Do you remember what version it was going to flash, and what the current version was? I’m wondering if it flashed an improper firmware and bricked it.
When you did the factory reset, did you get the yellow and then eventually red? In other words, are you confident you got a good factory reset?
When you did the general exclusion, the flashing red, I THINK, indicates a failure. So if it won’t exclude, that may indicate the switch is damaged. Do the logs indicate anything regarding the general exclusion? It may just have failed.
Can’t help much with the HA side. Are you using ZHA or Z2M?
I tried the factory reset again, just to be sure. Held the config button down for ~20 seconds, light went yellow, then red, then went out. Tried pairing again and HA didn’t even see it.
Only thing I can think of left to try is physically moving my HA Raspberry Pi into the same room as the switch, just to rule out z-wave distance issues. I guess I can give that a go later today.
I moved my HA into the same room as the switch and unfortunately nothing changed. Attempting to exclude the device eventually results in a flashing red light on the switch. Attempting to pair it results in nothing HA doesn’t see the switch, and eventually the switch flashes red.
I suggest completely shutting down your Z-Wave JS network, physically disconnecting power to the Z-Wave radio (unplug it) and then plug it back in after 30 seconds and reboot.
Unless you’ve already tried that when you moved it to the same room?
I’ve seen some weird things where the radio seems to get stuck and doesn’t work with a device that was removed from the network until that happens.
Thanks for the suggestion, I’ve done that more times than I care to count (including once today for other reasons). Still won’t even show up as a device when I try to add it.
I was hoping the HA logs would record what the version was, but all I see is the flash attempt, not any version info.