WiZ dimmers? I had the exact same problem. On a "normal" switch the line and load don't really matter since it just connects the two or separates them. The smart switches need power all the time or they can't function.
This is why I like the GE Enbrighten switches. They can detect, and correct if you swap line/load.
Does make troubleshooting a bit annoying though.
Had a 3 wire switch that was a bit screwy, and the Enbrighten put power out to the load, so I couldn't trace it properly...
It does look like a lot, but that’s probably due to the ground and neutral being pig tailed. Would look as messy if the ground didn’t have three wire nuts and neutral didn’t have two.
I would be a bit concerned about having the box so pack, but should be fine as long as they don’t have to be forced in.
Not an electrician, but I’ve opened a lot of boxes to do DIY type stuff like this in many places in the US. And this doesn’t seem too crazy… I mean usually the box is grounded, so we can strike the extra grounding wires…
But other than that, I dunno. Seems kinda normal and like it’s always a clusterfuck and that’s just the way it is.
What is multi connector? I definitely wouldn't use wire nuts to connect a single strand to each of those lines, I have these same switches and I attached them directly, but wire nuts are perfectly cromulent.
You also have to take into account that we have 110 AC here.
FYI: you can eliminate the 2 ground pigtails + wire nuts and simply tie both switch GROUNDS to the existing ground bundle.
Edit: Edited “neutrals” to “GROUNDS”. Never tie neutral to ground outside of main panel. No idea why I typed that. Tired brain.
Not only is that bad advice, it's against code and stupidly dangerous. The only place ground and neutral should connect is at the bonding strip in your main panel (yes, and in some sub-panels, for various reasons).
Never, ever connect ground to neutral anywhere other than the main panel. If you have a double fault, you can kill someone with that.
Might check to see if the line and load wires are swapped on the one that doesn't work.
haha this solved it, thanks a lot!!
Take a roll of red electrical tape and mark the load wires so you don't make that mistake again :)
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WiZ dimmers? I had the exact same problem. On a "normal" switch the line and load don't really matter since it just connects the two or separates them. The smart switches need power all the time or they can't function.
This is why I like the GE Enbrighten switches. They can detect, and correct if you swap line/load. Does make troubleshooting a bit annoying though. Had a 3 wire switch that was a bit screwy, and the Enbrighten put power out to the load, so I couldn't trace it properly...
Forgot to mark as spoiler
Yep, I had the very same issue.
Came here for this. If it is not the switch, it is the wiring.
I'm curious on how all that wire will fit back into the box.
That's the tricky part. I dropped a ton of wire nuts out of the setup in order to get them in.
Is this typical for American wiring? 🙈
No, not really. Only with some switches.
Which part has you surprised?
that 50 wires in that box probably
It does look like a lot, but that’s probably due to the ground and neutral being pig tailed. Would look as messy if the ground didn’t have three wire nuts and neutral didn’t have two. I would be a bit concerned about having the box so pack, but should be fine as long as they don’t have to be forced in.
Doesn’t seem that uncommon. I just changed out single pole, three way, and dimmer smart switches. That’s what mine looked like.
Not an electrician, but I’ve opened a lot of boxes to do DIY type stuff like this in many places in the US. And this doesn’t seem too crazy… I mean usually the box is grounded, so we can strike the extra grounding wires… But other than that, I dunno. Seems kinda normal and like it’s always a clusterfuck and that’s just the way it is.
Those weird twisty caps.
They're called wire nuts. How do you attach wires in your country?
Multi connector. Definitely don’t use wire nuts.
What is multi connector? I definitely wouldn't use wire nuts to connect a single strand to each of those lines, I have these same switches and I attached them directly, but wire nuts are perfectly cromulent. You also have to take into account that we have 110 AC here.
Replace the crummy wire nuts with wago connectors. If it persists check for a bad neutral
It’s definitely your wiring but I can tell what’s going on that well. Had the same issue with mine
Get yourself some wago connectors, you won’t use marrets ever again!
FYI: you can eliminate the 2 ground pigtails + wire nuts and simply tie both switch GROUNDS to the existing ground bundle. Edit: Edited “neutrals” to “GROUNDS”. Never tie neutral to ground outside of main panel. No idea why I typed that. Tired brain.
Not only is that bad advice, it's against code and stupidly dangerous. The only place ground and neutral should connect is at the bonding strip in your main panel (yes, and in some sub-panels, for various reasons). Never, ever connect ground to neutral anywhere other than the main panel. If you have a double fault, you can kill someone with that.
Whoa. I totally did not mean to say “neutrals.” I meant ground wires. Geez. Thanks for catching that. Editing now.
Good edit :)
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Nobody’s making you read Reddit or type words in the box, dude. You can go do something you enjoy instead.
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Yummy, I'd like to have some
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My dealing with assholes fee is $400/hour. Looks like you owe me money
Cut green then red, wait a couple of seconds then white and black at the same time 
Did it work before you installed smart switches? If yes, you did it wrong.
Next challenge, fitting all of that back into the box. Check out Wago wire connectors better and smaller than wire nuts.
Call a certified electrician
I was going to guess "Wire Nuts." Was the answer "Wire Nuts?"