MediumRoastSteam
So yeah it’s happening with steam boiler fully off and cooled down .
It’s not happening straight away, one video is after about 25 minutes and there is nothing wrong happening, group head was already red hot as the whole machine was.
Second video is after about one hour , already different , I can’t be the only one puzzled here 🤔
Edit: no crazy amount of steam either on one video.