Z-Wave unresponsive and unreliable

[JPe4619]

Maybe you have a problem like this:

How to fix a horrible Z-wave network

I’ve found the culprit! One of the Honeywell evohome thermostats was apparently low on battery and caused an RF storm in the same frequency. I’ve had this on evohome system once before (6 years ago). They operate on the same wavelength and will block all RF signals also for Zwave. 6 years ago I replaced most of the thermostats but this room we hardly use and I forgot we had this old thermostat still operating there. It was a coincidence that the homey 12.2.1 update went live at the same time…