I have the issue identical in description to what others, e.g. in “silencery”'s post.
I have 8 LZW31-SN. 4 in single pole mode, 4 in 3-way with dumb switch.
I’m pretty sure it’s not a defective LZW31-SN switch issue. Here is why…
I only have turn-off issue at one 3-way switch; 3 other 3-ways work fine.
At the problem location (switch)… I swapped dumb switches - no change, same turn off issue at the “problem location”.
I swapped the “problem location LZW switch” with "a “working location LZW switch” - the switch from a “problem location” now works fine at “working location”; while the working LZW switch, now in “problem location” is shutting off. In short, the issue is environmental, location/installation specific.
All 4 3way locations are wired identically, “classic” style. All have Neutral. I’m an electrical engineer, I double checked all wires in all locations… I’m quite sure wiring is indeed the same and correct (yes, it’s possible there is a wiring mistake, yet it’s not very likely)
Settings in all 4 3way locations: neutral, 3 way with dumb switch, min dimmer 35%
Using openHAB, however this does not seem material because I also reset the switch to factory, then manually set parameters 21 and 22 - same exact result.
I can reproduce the issue very consistently when both below are true:
- dumb switch is in 1 particular position (no issue when dumb switch is in another position); and
- LZW is above 80% (no issue if LZW is dimmed below 80%)
Here is a description of the “problem location”:
Load is 4 65W incandescent flood bulbs (260W total). Ceiling recessed cans. I tried with 2 bulbs - same issue. For the record… all “working 3way locations” have LEDs, wattage varies, all around 20 something. I hear you’re asking "did you try all LEDs in “problem location” - no, ran out of time (spend nearly a day experimenting, rewiring, rechecking, making videos), I can, pls lmk.
Video: https://drive.google.com/open?id=1hhvHySq7OhyCxwdsodv-9IUle5jlbn4N
https://drive.google.com/open?id=1C40Qip2WcXtUebnBJSnhJHgW7usfwPdH
Finally, it seems unlikely it’s a heating issue… the switch shuts off too quickly after it’s turned on. and it handles 260W for long time just fine (I mentioned - no issues working when dumb switch is in one particular position), not hot to touch.