honeywell thermostat

hi all Thanks in advance. I recently moved to a new house. It's 2 years old. Downstairs there is underfloor heating and 5 Heatmiser slimline thermostats in each area. Upstairs are radiators with trv's Also upstairs is one Honeywell T4 thermostat. I have programmed all the downstairs...

A year ago alongside a new combi boiler we got a new room thermostat/timer, Center RF 340017, which I believe is a rebranded Honeywell. Sometimes when pressing a button on it (e.g. to manually change the temperature), the display switches off and after a few seconds asks to set the time...

I am trying to install a new Drayton HeatHub (1zone), just trying to work out wiring as I am replacing Honeywell T40 thermostat. Images attached of exisiting wiring and new HeatHub wiring diagram. Cheers Jon 10D3C2B1-6E84-4DE4-988F-3E8C1B45CB6B by JonnyGo posted 20 Jan 2018 at 4:34 PM...

Hi. I'm new to this forum. Can any one help . I'm planing to replace thermostat Honeywell T40 to new one digital. How to wire new one there is only two cables on old one. Pictures attached. Thanks

Hi I am sorry for resurrecting this issue but I am a bit lost and need help. Have a nest 3rd gen heatlink and I am replacing the current thermostat, a Honeywell ST900. I have connected the L /N correctly and the heatlink powers up but the pickle I face relates to the 2 wires coloured black and...