Recent content by oscar_diy

  1. O

    Which cable to connect heating pump to Ecotec PCB

    This one? 'Vaillant 0010030691 Cable'?
  2. O

    Which cable to connect heating pump to Ecotec PCB

    Hi everyone, I moved into a house where the boiler had been wired up wrong. I have an Vaillant Ecotec 424. The external pump is not wired directly to the PCB. This means that when the boiler activates by itself (eg anti-frost mode) it is unable to activate the pump, which leads to overheating...
  3. O

    F.83 error specifically when boiler turns on by itself

    For anyone else having this issue, it appears that our pump was not correctly wired to the boiler. As such, when the boiler turned on by itself, it was unable to turn on the pump, leading to no flowing water and an overheat. However, when turned on my the honeywell controller, this did enable...
  4. O

    Vaillant ecotec 418 F72 F83 faults

    Hi did you ever manage to solve this? I'm having the same issue
  5. O

    F.83 error specifically when boiler turns on by itself

    Thanks! Would you be able to explain a little more? Why would this be the cause of the f83 fault, for example? Thank you!
  6. O

    F.83 error specifically when boiler turns on by itself

    Hi, We have a Vaillant ecoTEC boiler 424 (open vented). When we turn on the heating or hot water, it works perfectly. It can run for hours with no problem. However, every now and then (seems to happen at least one per day) the boiler tries to turn on by itself (anti-seize maybe?). When it...
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