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How do I get my radiator thermostats to start the boiler?

Hi there,
Sorry I know this has been discussed before but still need some help.
I currently have a V3+ smart thermostat wired where my previous thermostat was.
I also have an extension kit for the hot water.
I have numerous radiator thermostats as well.
All of these are paired to the bridge and I’ve created multiple zones.
The problem is that my radiator thermostats can only start the boiler and call for heat when the V3+ smart thermostat is calling for heat.
How can I make the set up so that the radiator thermostats can fire the boiler and call for heat directly (not via the smart thermostat)?
I’ve messaged Tado several times but they are not being very useful and are taking a long time to respond.
Many thanks.

Best Answer


  • When you added the devices, did you assign each smart TRV to a new room or did you choose the default room which will be the one that the smart thermostat is installed in?
  • @NoobAtWork I assigned them all to different rooms/zones.
  • Does the app show the zones as "heating to" when the temperature gets below the threshold?

  • @NoobAtWork yes they do.
    Their valves will also open up, but if the smart thermostat in the hall is not on or does not require the heat, then even though the radiator thermostat valves have opened, the radiator doesn’t heat up.
    I have to either turn in the smart thermostat in the hall, or if it’s on, turn up it’s temperature to fire the boiler so the other radiators can then get upto the heat they are trying to reach (I hope that makes sense)?
  • @SiBut Did you manage to figure this out?

  • @bertieblackman unfortunately not
  • Hi SiBut, I’ve just installed Tado and want your config :-) at the moment my valves call for heat but I only want them to call for heat when main thermostat requires heat. I will want it set to all devices call for heat once I have smart valves on all rads.

    I’ve read on another thread there are 2 switchable modes which only support can change which sets smart thermostat to call for heat before trv’s can or any device can call for heat.

    I’ve tried emailing support and used the chat function but had no reply to either, not a good start for customer service from Tado for such an easy fix.

  • There's a couple of routes to look at
    1) contact support to ensure trvs are set to primary, this enables them to take control of the boiler
    2) ensure your smart thermostat is set up correctly, in my instance as soon as I set it to 'ST' instead of 'R01' (as soon as I changed this it jumped into life)
  • seems a number of us have the same query, one of the primary reasons for purchasing TADO was the ability for each room to call for heat individually and not be dependent on a single thermostat

    @jonno - what does the change from T01 to ST d0?

  • correctio - *R01 to ST do?

  • @Jonno Thank you. I think this has worked. Just changed the setting to TS and now I’ve been able to call for heat on a smart radiator thermostat.
  • Why could they just not this instruction easier to find?

    Now I've found this menu what do the settings HC01 and EK do?

    @Jonno Thanks

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