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posted on 20 Nov 2022

Vaillant Eco Tec Plus system boiler hot water priority diagrams

posted on 20 Nov 2022

This are diagrams for domestic hot hot water priority set up using:

  • – Vaillant system boilers
  • – Vaillant SensoComfort controls with VR 71 wiring ceters
  • – System with hot water cylinder, radiators and UFH

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Vaillant Eco Tec ‘Con’ error code
URBANPumbeRAdmin • 12 January 2020
If your boiler is showing ‘Con’ message on main display it means that your main PCB or possibly display PCB has failed and will need to be replaced. ‘Con’ message means that there is a communication error between main board and display board. Both boards are connected directly with pin connectors so that takes out […]
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Vaillant Eco Tec Plus 624, 637 – fault, error code F.76
URBANPumbeRAdmin • 14 March 2015
Vaillant fault code F.76 is quite a worrying one. It means that main heat exchanger overheat protection had been activated. Vaillant Eco Tec range has a thermal fuse on top of the main heat exchanger that once activated breaks the circuit to prevent boiler from firing. That fuse is can not be reset and is […]
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