jcb1973 And now the problem is back - slightly different, it’s taking about 10 seconds after the preinfusion (6s) to get up to pressure… Help!
MediumRoastSteam if by doing a reset it purged 500ml through the group, then yes, most likely you had an airlock of some kind. I can’t think of anything else.
jcb1973 The problem was solved by syringing water through the intake hose with the pump running. The reset provided only temporary improvement, but the syringing has 100% resolved this, and the spluttering steam also!