@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.

I'm still on 2.7.0 despite sending my TP-Link account details to get the update. Probably going to box them up and send all 10 back to Amazon in the morning along with all the temperature and...

No. My Firmware is exactly the same as before. No change to the problem.