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3 way controller help!

Hi, hoping someone can help or point me in the right direction.

I have just bought a new build property. It is a 3 storey house with 2 thermostats and a 3 channel controller which runs the 2 thermostats and the hot water tank.

I have just purchased the tado starter kit with hot water extension, and extra room thermostat and 8 radiator thermostats.

I need some help setting up the whole system as I have read the extension kit only replaces a 2 channel controller. What do I do?

The first thermostat is on the ground floor in the hall and the second is in the master bedroom on the 2nd floor. The controller is on the second floor in the airing cupboard. The boiler is in the garage and the water tank in the loft.

Thermostats - Hortsmann HRT4-B

Controller - Hortsmann H37XL Channel Plus

Hope this is enough information and someone can help me.



Best Answer


  • samdsamd ✭✭✭
    edited March 2
  • I have asked them the same question but haven’t heard anything back yet.

    I was hoping someone on here may be able to help who has had a similar issue or set up.

  • @dom478 your current setup is not using wireless thermostats and they are directly wired to your controller. From a DIY perspective your best option is to retain the controller and replace both HRT4-Bs with Tado wall stats. You then set both CH channels on the controller to ON/CONSTANT. You then need a minimal amount of re-wiring to add the extension kit next to the controller for HW control.

    Removing the Hortsmann controller is a more extensive task and would probably require the hiring of an electrician.

  • @GrilledCheese Great thanks a lot for your help.

    Is it pretty straight forward to wire in the extension kit for the HW?

    Will this setup enable me to use the full Tado functions to control the whole house from the app?

    Thanks again
  • @GrilledCheese brilliant, thanks so much for your help
  • This is exactly what I want to do. I already have the wired thermostats setup with my existing controller setup to always on. How do I wire up the extension kit to control the hot water?
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