Blue Series 2-1 switch losing power

I switched out most of the switches in my house to Blue Series 2-1s. I will eventually be fully on Inovelli switches once the presence sensor ones ship :slight_smile:

Everything appears to be working fine for all but 1 switch. Every so often it just loses power. The circuit is still energized, as other items on that circuit still work, just the switch itself has no power. LEDs are off, and switch doesnt respond to any presses or remote activations. If I flip the breaker for the circuit off and on, the switch will come back online and act normally. The switch will work anywhere from a week to a month (doesnt appear to be any specific timeframe) before the problem re-occurs.

I’ve got all the switches integrated into Home Assistant via Zigbee2MQTT. I was hoping for some troubleshooting ideas to determine the root cause of why it keeps failing.

Hello,

Have you tried swapping a different Blue 2-1 switch into that location to see if the issue follows the switch or the location? That could help isolate if that particular switch has an issue or there’s something electrical going at that location.

What kinds of loads are downstream of the switch on that circuit?

Are you running in a configuration with a neutral wire?

Unfortunately I have not had a chance to swap out the switch for another one. I was hoping there might be some logging that I could enable/check in homeassistant before I needed to start moving switches around.

The switch is installed with a neutral.

Downstream of the switch are a number of wall outlets. Connected to them are a TV, PS5, Mini-fridge, and a treadmill. The. treadmill is connected to a surge protector, but the other items are connected directly to the walls. I also have a whole-house surge protector installed in case that has any bearing. I don’t think it does though, as it was only installed last fall when we had solar installed, and the switch was having issues before that.

The intermittent nature of the problem makes it a challenge to troubleshoot.

I think you might have misunderstood @Bengineer’s question - he was wondering what loads you have connected to the switch in case something with the load is causing it to have problems.

  1. Can you confirm that the switch sees the neutral (it should be visible as an attribute in Z2M)?
  2. What load do you have connected? What’s the wattage of it?

LMAO, I totally did.

The only load connected to the switch is a single light fixture that has a non-smart LED bulb.

I checked what’s reporting in HA, and it does indeed see the neutral.

Based on your description, it seems as if the switch is truly losing power (as opposed to just freezing). Since the switch is wired with a hot and a neutral, I can think of only two things that would cause a switch to lose power on an energized circuit.

1 - A loose connection at the switch. I’d pull the switch and make sure that the conductors are solidly attached, with the conductor between the backing plate and the screw. I know it powers back up ok with a breaker reboot, but it’s still worth checking.

2 - Defective switch

I’d also try removing the faceplate completely, and checking that the air gap switch is seated correctly.

I’ll check the connections. Didn’t even think to check toe air gap switch.

Assuming both of those are good, I’ll see if I can swap with another switch to see if the problem follows it.

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