kautivo Dear @DavecUK the valve named as “one way” is the only part shared between both boilers if the pressure in steam boiler is high when we find the fail, Is it possible the problem happen if the valve don’t work right ? What do you think?

It might be that there is am intermittent and momentary leak to the steam boiler (autofill solenoid) when the pump starts, so it speeds up thinking it needs more power to get the pressure. Then the leak stops as the pressure rises and this causes the pressure to peak momentarily (like a water hammer effect) before the pumps PID can respond…once peaked, the peak will take a while to come down as the brew circuit has a lot of resistance due to the puck now being wet.

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      Is @kautivo’s machine not in Naples? Did Kautivo not fly to Naples to visit ACS factory to investigate the problem with the machine at the factory? The last couple of messages are suggesting not?

        JahLaza my friend yes i flied to Naples and i visited the factory, Paolo and me tested the machine there several espressos but we only saw something similar the jump of pressure when the glicer was removed but it was because the circuit had air, in the next shots the machine worked right but then we need know the parts changed there because here @AJuar and @tocateclas machines’ continue with the problem even without glicer…

          Ah ok, so your machine is working ok now? Air trapped in the circuit caused the issue?

            JahLaza because when you remove the glicer the water go out of the circuit and in the next shot happen it

              DavecUK That makes sense. The pump struggles to pass the 2 bars during the preinfussion probably because the autofill valve is not 100% closed, this would explain why this happens only when the service boiler is under pressure. But I already changed this electrovalve so don’t know what to do next…

                  tocateclas autofill valve is not 100% closed, this would explain why this happens only when the service boiler is under pressure. But I already changed this electrovalve so don’t know what to do next…

                  which electro valve exactly did you change (photo please), is it possible the new one has gone faulty, or some loose scale is affecting it?

                  The steam boiler won’t show the increased pressure, as it reads temp and does the conversion to pressure. However, if you draw steam after this happens, does it come out super strong then die down suddenly.

                  This only happens when the steam boiler is on correct?

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                      DavecUK

                      Thanks again,

                      This one (photo not from my machine):

                      I changed the whole brass piece, everything but the pressure sensor. Problem was there before changing all these spares.

                      No, steam is always normal, not super strong. The steam boiler seems to work all right.

                      It happens when the steam boiler is hot, no matter if it’s on or off.

                        a month later

                        prezes Hello, do you have the link where to buy the mirror?

                            prezes It looks really good. How did you manage to fix it there? I assume it is removable so you can clean the tray every now and then?

                            Current setup: ACS Vesuvius, Nuova Simonelli Mythos One. Past experience, Nuova Simonelli Apia 1 gr., San Remo Capri 1 gr., Bezzera BZ 35e, Fracino Heavenly. Anfim Super Lusso.

                            Contact me at: john_yossarian11@yahoo.com

                                John_Yossarian I was planning on attaching some foam to support on both sides so it’s stable but flexible. Funnily enough this size just sits perfectly on its own at right angle and doesn’t vibrate or move at all so can be easy removed as and when required

                                mailto:kafar@btinternet.com

                                  6 days later

                                  I need a bit of help. In the last few weeks I noticed a noise starting after the machine is cooling down. Seems to appear when the brew boiler is under 35c and steam under 55c.

                                  It seems to be coming from the hole pictured and stops when I block it with finger. There’s no drip etc.

                                  Any ideas if this is something to worry about ? I’m sure it wasn’t doing this previously.

                                  mailto:kafar@btinternet.com

                                  That’s fine. It’s the anti vacuum

                                  Decent De1pro v1.45 - Niche Duo - Niche Zero - Decent is the best machine ever made -

                                    Yeah mine does it too

                                    Decent De1pro v1.45 - Niche Duo - Niche Zero - Decent is the best machine ever made -

                                    prezes Cuprajake thanks. I was convinced it never done this before so thought I’ll check !

                                    I think it’s the vacuum breaker as well, but as you say it’s doing it at lower temperatures, it might be sticking a little, until it cools down more. You can try steam cleaning it using the wooden spoon trick, or replacing the O ring….but it does depend on what type of vacuum breaker you have?

                                    Photo please..

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                                        19 days later

                                        I lost the track about all these advanced setting in the machine… is the best way to go for settings according to manual or do you guys suggest to change some setting to get even better performance of the machine?

                                        I mean for instance pump speed and so on.