@Wayne-TP Not sure even if you are monitoring this any more but one thermostat reported Low Battery. I replaced the batteries and now its showing "Error" with a red battery symbol. Just to add to the...

@Wayne-TP Restarted the Kasa and Tapo Hubs, restarted the Deco they are linked to. No different, some Thermostats still flat-lining at 16 degrees. Also, updated the firmware to 2.9.0. I sat there...

@Wayne-TP downloaded and installed. Noise less apparent but now most of the thermostats state a temperature of 16 degrees and they've been that way since before the update, since 03:45 yesterday...

@Wayne-TP Assuming that's aimed at me; yes I ran recalibration, twice. I don't recall the make of original TRV but they are only 3 years old and the Kasa TRV screws directly to them without the need...

All 10 valves refitted and updated but they're not right. The last few milliseconds still emit a grind, its as if TP-Link just reduced the overrun, but by a set amount that is just in excess of what...

@Wayne-TP I have re-sent.