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Tado wall thermostat triggering boiler despite no heat demand

Vertigo
Vertigo ✭✭✭
edited November 3 in General Questions & Topics

Ive been using tado, and have it integrated in to Home Assistant, for 4 or so years with no real issues. Until this season; suddenly my wall thermostat regularly triggers my boiler, despite there being no heat demand from any of the TRVs or the wall thermostat itself, as seen both in the tado app, and in Home Assistant that I use to log/monitor and control tado. Rooms can be several degrees above the set temperature, yet the boiler turns on and turns the rest of my house in to a sauna. This seems to happen when the schedule changes, or possibly when I manually (or via HA) set a room temperature -even if that target is 2C below the current temp. This is not a malfunction of the boiler, I can hear the thermostat relay clicking.

I monitor and partially control tado via Home Assistant, but it shows the same as the Tado app; no heat demand, but I can see my gas usage and temps increasing until it becomes a sauna.

Please advice.

Comments

  • Vertigo
    Vertigo ✭✭✭
    edited November 3

    I tried this: all rooms where OFF, except my study, where it was in auto (schedule temp = 17C). The actual room was 21C. When I changed the mode to manual and set the target to 19C, the boiler triggered. No heat demand shows on the graph in tado app (or home assistant) This is nuts. Please fix this, I bought tado to save on energy, not waste it.

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