Tado turning heating on in the night - any ideas?
I have 7 rooms/radiators controlled by Tado with a wireless thermostat in my living room room and Tado TRVs providing the temperature input for another 6 rooms. Everything is on the same boiler and radiator loop. I'm in the UK if that makes a difference so it's a very conventional UK pumped hot water radiator system all on a single loop with no fancy zone valves or anything just TRVs controlling individual radiators.
Last night I got caught up in a book so was on the sofa in my living room until 2:00am finishing it. 2 of my rooms are spare bedrooms so are always set to 5C since I don't use them. The other 5 rooms are all set at varying temperatures during the day but all have smart schedules that put them down to 5C at midnight except for my master bedroom that is set to go down to 10C overnight. When I finished my book it occurred to me that it was still very warm so I went and checked my sitting room radiator and it was on full blast at 2:00am and blazing hot.
Now I know that it is strongly recommended by Tado to have a TRV on the radiator in the room with the wireless thermostat in it but I have fancy designer radiators and to fit a TRV I need to replace the radiator completely with the version designed to take a TRV. I might well do at some point because I understand why it is best but for now at least this non-TRV radiator is in the biggest room in my home that is set to the highest temperature of any room anyway (by about 1C) so as TRVs fire up the boiler to keep my other smaller rooms at their set temperatures during the day and evening it is unlikely that the extra kicks of heat into my bigger sitting room will take it too far over temperature, or even over temperature at all, and in my few weeks of Tado ownership this does seem to be the case so for now I'm living with what I have.
At first I thought I might have accidentally set a room temperature higher and left the room set on temperature changes staying in effect until manually cancelled rather than until the next schedule temperature change (I've made that mistake about 3 times so far as I've added rooms/TRVs!) but no, every room was at its expected 5C/10C overnight smart schedule temperature and all rooms were showing current temperatures on the Tado dashboard significantly above their set temperatures. Even the unused and never heated bedrooms were at about 12C and the living room was at 22.5C vs their set temperature of 5C so, as expected, the Tado dashboard showed no heating on any room despite the fact that the boiler was on and pumping out heat at full blast into the un-TRV-d sitting room radiator. The Tado wireless receiver did "know" that the boiler was on because when I went and checked it I could see that the blue heating LED was on so the reason that the boiler was on was because Tado was closing the heating relay in the receiver rather than a short circuit or some other glitch in the boiler itself.
I then looked at the lights on the internet gateway and all 3 were solid white and the Tado app confirmed that there were no "connection lost" or "no remote access" communication issues in my setup so I am now at a complete loss to explain what was going on. This seems an incredibly basic fault so I'm wondering if there might be some faulty hardware in my setup or does Tado sometimes have such "brainstorms"?
As a next obvious step I would have power-cycled my internet gateway and maybe also my wireless receiver in case it was a firmware bug that a reboot might have cleared but it was about 2:15am by then and I didn't want to mess about with it in the dead of night, and it's cold in the UK so I also didn't want to risk ending up in a no-heating situation the following day (today) so I just left it alone.
As I type this it is now 11:00am and the boiler is off so Tado has finally stopped holding down the relay switch when no heating is required and my dashboard is showing every room pretty much dead on their smart schedule target temperatures so sanity seems to have returned. I still need to contact Tado support on another couple of issues so I'll watch what happens overnight tonight and Sunday night before contacting support on Monday to discuss this and the two other issues that I am having but in the meantime I'd be interested in any insights that more experienced users might be able to offer regarding why my Tado setup went crazy last night and whether the behaviour I described above has been encountered before. Anything I can learn hear first might be very helpful for my discussions with Tado support on Monday.