VZM30-SN failing with erroneous overcurrent condition and active/periodic power/current monitoring is failing

Hey everyone, I’ve got a bunch of blue dimmers installed, first time installing an on/off. Turned it on and it seemed to work great! Then I came back upstairs later and it’s flashing red every few seconds. The switch is wired to a 70CFM ceiling fan with a 1.2A rating. Not sure on the motor HP, but it’s a Nutone 695-R03 if that helps.

I checked Home Assistant and for some reason when I turn the switch on, the current and power reported don’t update. Then a minute later when they do the switch reports exactly 21.81A and goes into this loop of flashing red, back to normal, flashing red.

To be clear, I don’t think this is actually a real ~22A load, because I’m on a 15A circuit and haven’t tripped it yet with this fan on a dumb switch.

Anyone seen this before?

What firmware are you on? There were reports last year of issues with bathroom fans, unresponsiveness and inaccurate energy reporting.

The current production fw is 1.03.

Supposedly 1.03 I think. It’s a hex string but it ends with a 3. If I can flash over it I’ll try that to see if there’s maybe just a bad FW flash

Edit: current fw is 0x01100103

Digging thru Zigbee clusters, it seems the switch was manufactured on Dec 24, 2025 and FW is 1.03

Is there a way to reflash the latest OTA on my switch? The switch turns on, runs for a bit and then shuts down blinking red (or LED off entirely). Until this point, active and periodic power reporting do not happen, but at the time of failure I get a bunch of (mostly bogus) info.

At failure time I get 600-ish% RH, -30°F, and 21.81A (always that number). The power number looks accurate at about ~120W (the fan is rated for 1.2A).

Reconfiguring, factory reset and attempting to manually change the divisor of the metering cluster (which reads 15880) all fail to resolve the issue