Recent content by koala156

I'm getting a new servo valve too. By taking both off I will be able to check the tubes for any blockages, right?

hi Gasguru, thanks for the response, actually 'diverter valve' is exactly what I roughly translated as 'Priority Switch Valve' - that's the part which I'm getting new. The repairman who looked at the boiler said that this valve is most likely causing the problems. I did try 'helping' it...

Hi all, (I don't live in the UK and English isn't my primary language; however I'm hoping I can get help here as this forum seems to be the best one for Vaillant-related DIY questions) My story: in the apartment which I own we have a Vaillant VCW 180 XEU boiler for both, hot water and CH...