The Efficient Home Forum

No unfortunately not possible, you'll need to swap it out with a BDR91.

https://thesmartthermostatshop.co.uk/?p ... pe=product

Having used Home Assistant for many years, the system is always evolving and a level of experience is still required if you want to do something useful with all the integrations. For sure, green and yellow will certainly get around the initial setup from scratch issues, but to advance the system ...

What boiler is it? How long has the thermostat been fitted?

You need the Mixergy cylinder to give a 'satisfied' and 'not satisfied' demand to the CS92A. This can be done with a resistor box with a couple of resistors and a relay attached the Mixergy cylinder. I'm assuming this is what the Mixergy MK2 Heat Pump Interface will give you? Any reason why the ...

If you have HR92's on all radiators then you setup the system like the schematic on page 46 of the evohome installation guide with no heating zone valve - its just not required.

You bind it into the zone on the evohome Controller - contact tech support for assistance on 0300 130 1299.

HR92 Radiator Controllers in bathrooms are not ideal. They get damp and battery contacts/PCB corrodes from the moisture etc.

Personally I would leave them open circuit or with a manual TRV head.

Yes correct, although the above diagram shows the grey and orange made safe.

The HCC100 has a 'Pump' terminal which gives a switched live but only operates when there is a demand for an UFH zone.

You wire it similar to how the HCC80R used to be wired (I will do a HCC100 version when I get 5 minutes)...

Obviously some changes have been made on the new firmware with unexpected consequences. Feeding back to tech support is your best option, although I would imagine any fixes will be in a future update.