Recent content by Engineer11

  1. E

    valiant vcw sine 18 T3 W runs continuously.

    Hi everyone, it’s nice to see some follow up on here, so here it is! I thought I should go into detail in case it helps anyone. BTW if anyone has any questions about the VCW Sine 18 or for that matter a Swiftflow 80 then fire away! I checked all the micro switches and all OK, Main PCB and...
  2. E

    Vailant VCW Sine 18 T3W heating can only be switched off with the Control switch on the panel, even with the thermostat removed.

    Hi everyone, it’s nice to see some follow up on here, so here it is! I thought I should go into detail in case it helps anyone. BTW if anyone has any questions about the VCW Sine 18 or for that matter a Swiftflow 80 then fire away! I checked all the micro switches and all OK, Main PCB and...
  3. E

    Vailant VCW Sine 18 T3W heating can only be switched off with the Control switch on the panel, even with the thermostat removed.

    Thanks, I take it that's the one on the left side with the plug going into it with a few wires coming out of it and you can remove the top can from it. So it could be the microswitches on the top of the diverter valve that's opened by the wax capsule?
  4. E

    Vailant VCW Sine 18 T3W heating can only be switched off with the Control switch on the panel, even with the thermostat removed.

    I am new to this forum. I am an electronic engineer, but I have a problem with my dad's VCW Sine 18 T3W. Over the years I have fixed the PCB and many other problems as well as a new pump, diaphragms, pins, and motor run capacitors in the pump. It has been a great boiler and is still working well...
  5. E

    valiant vcw sine 18 T3 W runs continuously.

    Hi all, I am new to this forum. I am an electronic engineer, but I have a problem with my dad's VCW Sine 18 T3W. Over the years I have fixed the PCB and many other problems as well as a new pump, diaphragms, pins, and motor run capacitors in the pump. It has been a great boiler and is still...
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