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Hi sorry I wasn’t sure if to post here or in electrics. Hope someone can help identify this controller. Also can I just swap to a newer one if required ?

Thanks flameport that’s what I was guessing at, but nice to have it confirmed.

Hi I would like to replace my ST9400 and remote thermostat with a T6R-HW. As far as I can tell I have an s plan system (I.e. it seems to have two valves) but in the st9400 controller I see that the pin 1 hw off is connected but all the diagrams I can find only have hw off on a y plan. Can anyone...

Muggles, thanks for your reply. I assume you mean option 1) I can locate the T6R where the ST9400 is and use the current wires there. Then the Change in the wiring centre. I only have the following wired in the ST9400 1 - HW OFF 2 - CH OFF - nothing connected 3 - HW ON 4 - CH ON

thats The same as I have currently. I am moving to the T6R-HW mainly to set different temperatures at different times of the day. For instance I like it cooler in the morning and warmer in the evening. Plus there is the added advantage of being able to use the phone to control the settings and...

Hi Hope someone can point me in the right direction. I have a Honeywell ST9400 with remote thermostat. The ST9400 is in the airing cupboard whilst the thermostat wireless receiver is in the loft next to the boiler. When I replace these units with the T6R should I 1) replace the ST9400 with the...