What will I need?

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I have a Vaillant VU 186/6-3 (H-GB) ecoFIT pure618 boiler with a timer/programmer in my utility room which controls both heating and hot water. I have a Honeywell basic thermostat in my living room.

When the wood burning stove in the living room gets too hot, the heating upstairs will not come on. I therefore need a thermostat (preferably wireless) for controlling the heating upstairs.

What Tado components will I need to achieve this? Will I need to replace the thermostat in the living room, or can I just have a wireless one upstairs?

Many thanks in advance, I have sent an email to support, but I guess they are really busy right now and Black Friday deals end on Monday.