I have a total of 4 fan controllers, half work with no issues. The other half are not actually operating the fan. They all used to work.
I can physically see the app is controlling the switch (e.g. I can turn it off and the blue light goes off). Is there anything else that might be preventing from the actual fan operating?
It cuts all power to the device and then restores it.
That’s really weird, especially since you see state updates in the app and the switch itself. If the airgap switch doesn’t do anything, it could be you just have 2 dead devices, even though it sounds unlikely that 2 would go out at one time.
I’m not sure what you can do. I’d be curious to know if the airgap switch did anything.