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Thought this was worth sharing, as after many years of thinking you have to get in touch with Tado in order to change the boiler flow temperature when you are using an OpenTherm style connection (BUS, eBUS etc), it turns out the options are available to us, but only using the Tado for Installers App, or the web settings which are quite well hidden away. After much trawling on the web yesterday, I only came across one mention of this Tado for Installers App, though i had seen it in the app store, i just presumed that all it did was supply instructions for wiring boilers for installers, which it does, but also has a few more tricks up its sleeve. In order to connect to the OpenTherm connection on your boiler (and there are many different versions, but all are 2 wire digital, so are connected in the same way), you either need an older Extension Unit (V3), these start with a serial number of BU, or the newer starter kit, but currently only the EU version has the digital connections. There is a mention of a new version being released in the UK which will have these connections, but for now you will need one of the mentioned units. Once connected up to the boiler, i had previously assumed that no further config was required, and Tado were the only ones who could change flow temp settings...wrong! Either open the Tado for installers app, or browse to https://model-selector.tado.com/ Enter the serial number of your Internet Bridge, and the Auth code which is printed on the side of it (this assumes the system is setup and linked to your tado account). You will need these details for both the app and the web portal, so if they aren't easily accessible, write them down. Serial number of the IB is in the main app also. Once accepted, it will show the following: Mine is obviously already setup, but if these details are wrong, click Edit Boiler Details, which will take you through a manufacturer and model search. Once the correct boiler is selected, it will show you the recommended digital config, and also the wiring instructions for the specific boiler. Once all the details are correct you can check the status of setup, and it will show something like the following: If data can be read from the boiler, then the digital connection is working. If not, we can change the communication protocol to match the boiler, but this can only be done via the app for installers. From here press on configuration Select the correct bus type, The Dxx are the digital connection types supported by Tado. If you are unsure which protocol, contact the boiler manufacturer, or consult the install guide. It will show a confirmation screen like the following before you submit At this point I disabled the activate hot water control, so my boiler isn't a system boiler, but like a lot of modern boilers, has a comfort option whereby it has a small tank of water which it can preheat. I don't use this feature, hence turning this off at this point. Once this setting goes through, please check the boiler settings to ensure that comfort mode is turned off, and once set it will stay that way, and hot water control can be controlled via the boiler control panel directly. Back on the web interface, if you wish to change your boilers flow temp (since using OpenTherm/Digital overrides any local settings), simply press on the following button, set the temperature and confirm, and it'll update on the boiler after a few seconds Final feature i discovered was the ability to run firmware updates of the various Tado devices, these are of course automatically done, but if any issues have occurred you may need to force manually, this is done via the app, by pressing on the following button I'm pretty sure this will be of use to lots of people, and will save a lot of hair pulling!! Moderators - Would you be so kind to pin this post either in this forum, or move to whichever seems more suitable