i want to change my potterton pr2t room thermostat to a honeywell dt90e but i have a red yellow and blue wire and the honeywell only takes 2 wires is there anyone that can advise thanks :?
i am trying to change my potterton room thermostat that has a red/yellow and blue wire to a honeywell dt90e that is only a 2 wires a live and neural has anyone got any ideas