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Wireless receiver is not switching my Vaillant boiler on and off

blackpearl
blackpearl
in General Questions & Topics

Hello

I have wireless receiver connected via analog 7/8/9 clamps to my Vaillant VU 122/2-5 boiler as per guide but it is not switching the boiler on or off.

I have removed the old Vaillant wired thermostat (also connected via 7/8/9 pins) and it is simply not switching the heating on.

My Vaillant do not have bus +- terminals.

Can you please help me with this?


Thanks a lot

Petr

Comments

  • johnnyp78
    johnnyp78 ✭✭✭
    Is the wireless receiver powered up? Did you follow instructions from Tado?
  • blackpearl
    blackpearl
    Yes receiver is powered up. And yes all was done based on the tado instructions. However led light for heating on receiver is flashing slowly, shows that system is heating the room but boiler is off.
    Boiler is switching on and off like there was not any receiver/thermostat connected.
    Any thoughts please?
  • johnnyp78
    johnnyp78 ✭✭✭
    Try bringing the bridge closer to the wireless receiver. Sounds like it isn’t paired.
  • blackpearl
    blackpearl

    It is paired everything between the TADO devices works correctly.

  • johnnyp78
    johnnyp78 ✭✭✭
    Could be any number of things, a faulty unit from Tado, incorrect setup on the wireless receiver, or a wiring problem, at a guess.
  • blackpearl
    blackpearl
    edited November 2023

    Faulty unit it is not, setup is correct, wired to analog clamps 789 as per manual.

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