I have a Honeywell T4R wireless programmable thermostat connected to the zone valve for heating upstairs.
https://heatingcontrols.honeywellhom...le-Thermostat/
I am looking to upgrade to Evohome control. Does anyone know if the wireless receiver for the T4R can be bound to the Evohome controller once it is unbound from the T4R or will I have to remove it and replace with a BDR 91?