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    Vaillant Controls - is it possible to mix wired and wireless?

    We have an all Vaillant setup - an EcoTEC Plus 637 system boiler plus wired VR720 and VR92 SensoCOMFORT controller, driving two CH zones plus DHW. It all works, but unfortunately we have found that the room stats are poorly located, and so the level of control is not what it should be. We had...
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    Scantronic 9853 alarms on entry - sometimes!

    We inherited a Scantronic 9853 setup in our new place. I ran a bell test and walk tests and have managed to change codes and so on, and basically it seems to work fine. But, it has set off its alarm on entry a couple of times. We definitely keyed in the correct code, but it didn't disarm...
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