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Hi, Has anyone fitted or used the Vaillant vSMART or Glow-worm MiGo WiFi smart controllers? I understand they are both the same, but one is branded Vaillant and the other Glow-worm. There's limited info on their websites which mainly covers the installation not how to use it. The app has a...

With HW full on (14.35 lpm as measured by boiler) - 3.66m3 HW on slow (4 lpm as measured by boiler) - 1.23m3 During the slow test I noted that the meter stopped briefly a few times. If you look at the log below, you will see that the boiler killed the gas when the DHW heat exchanger and return...

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I don't think so. Mine (VR65) does not. Find the part number of yours. If VR65, its a no. If its another, then Google the manual to check.

That’s interesting. However, the Vaillant weather compensation adjusts the flow temp to the rads based on a function of room temp, outside temp, and desired temp. This allows the CH to run at as a low temp as possible to maximise condensating in the boiler to maximise efficiency. You will...

Thanks again Tony. I will do this when I next visit them on Wed and post back later in the week.

Hi Degsy, It seems that the Owl system would replace both your existing VRC470 and wiring panel. That’s a shame as I believe the VRC470 has weather compensation capabilities which you would loose. The Vaillant controls connect to the boiler via their proprietary e-bus system and the Owl...

Thanks for your input Tony. I did by setting to boiler to full on, noting the gas usage at the meter over 2 mins and multiplied by 30. I guess you're going to tell me this is not ideal, but it returned a figure close to that in the spec. Ref paying for the parts - agreed. I will approach...

It could be an issue with the expansion tank. Its interesting to note you didn’t have this problem before you bled the cold rad. It might be the rad full of air was acting like an expansion tank which prevented the pressure build up. Things to check – blocked hose to expansion tank, tank needs...

I would be grateful if anyone could provide ideas/guidance on this issue with my parents boiler. The central heating engineer who fitted and maintains it, spent a lot of time with it and on the phone, and ended up replacing the pump. £300 later the problem was not fixed! Problem - Hot water...