dilin
Actually I brought the pressure down to 9 bars by adjusting the OPV, but the screeching sound much worse. The machine was still under warranty, so I sent it back. Got a replacement and the new one hasn’t done any noise, aside from the metal trays clicking randomly, which I’ve grown accustomed to and don’t bother me since I know it’s not from the boiler.
Now I have a new problem, which I will post….