Hey was wondering if anyone can give some advice on this. This is my first espresso machine so pretty naieve but I think I have an issue with the Puristika. In short the only way that I can pull a shot fully is if I hold the brew lever in the upright poisition with my hand for the entirety of the shot. If I do not hold the lever as soon as there is a ramp up in pressure the lever moves slightly and disengages slightly from the pressure switch - can hear the click of the pressure switch. I have uploaded a video to Youtube which shows the issue - using a blind portafiler (don't want to waste beans) How long have I had this issue - well I think pretty much from the beginning (ony had 2 weeks). Took me a while to realise that I am not meant to hold the brew lever in place with my hand - watched some other videos and others do not have this issue. Before I play around and fiddle with things thought it best to see what you thought. I have also emailed the retailer for their advice as well. Here is the video below: [Puristika](https://www.youtube.com/watch?v=fhPSDY0IcAU)

@"Beverast"#p1336 - that’s a problem very easily fixable I believe. You just need to adjust the switch. I don’t have an e61 anymore but I’m sure @"Elcarajillo"#46 or @"DavecUK"#1 can explain what to do. If however, there’s a major problem with the switch, it’s best tomdontsct your retailer as the machine is under guarantee. In fact, I’d contact your retailer first before doing anything. 👍

Just adjust the pressure switch out slightly. I checked mine and it's slightly unusual in the outside nut secures the switch to the case….**All the adjustment to push the pin forwards seems to be done from inside, and unfortunately I don't have a photo of that specific part.** If you take that photo of the back of the Microswitch, we should be able to help. [upl-image-preview url=//i.imgur.com/sj2R4lW.jpeg]

Thanks for the quick repsonse guys, very much appreciated. Looks like a simple enough fix - Dave, I will look into what you have suggested once the retailer gets back to me. Thanks again for the help.

Dave is correct, there is a lock nut on the back of the brew switch. You will need access to the back and a 14 mm or slim adjustable spanner. Slacken the front nut then rotate the (rear) locknut with fingers to allow the switch to move forward, (try about 1 turn) then retighten front nut and check the action. If not enough try another part turn until you are satisfied with position. Gently nip up front nut while holding the switch steady. NB. Turn off power before opening the case.

So, some sucess but not completely. Retailer got back to me and suggested exactly what everyone has advised here…move the switch forward. So, I took off the casing and have moved the panel at the back of the switch as far forward as it can go (there is no nut to fiddle with, just a panel). This has now eliminated the pump switching off, so that issue is fixed. However, the PID is still switching from the shot timer to the temperature reading when you get the ramp up in pressure - the brew lever is still moving ever so slightly which disengages from the pressure switch (can hear the click). As said the pump still goes, but the shot timer switches to the default temperature reading. You can see this in my Youtube video below. Any other suggestions at all? https://www.youtube.com/watch?v=jNHEpoOy6Gw

@"Beverast"#p1529 I asked you to take a photo/s of the back of your switch, because I don't have a photo of that part and I have a prototype. If you did, can you post them here, just in case we're missing something on how to adjust it, and I can check the wiring to the switch.

Dave, please see photos below. I thing the issue is now fixed. I ended up tightening up everything a little bit more and now the PID is not switching and there is no click. Still need to test it on a shot though. [img]https://i.postimg.cc/sx2TX0r9/pur01.jpg[/img] [img]https://i.postimg.cc/W10w2PZc/pur02.jpg[/img] [img]https://i.postimg.cc/63prL2mB/pur03.jpg[/img] https://www.youtube.com/watch?v=cSovTweDM2Y

Interesting, they are using one switch for the pump and the other for the PID timer start stop. I guess they may have been worried about interference? Glad it's sorted now.

@"DavecUK"#p1543 Have just done a test shot and everything is working fine. Need to work a bit on my puck preparation though haha. At least I got my timing just about right - 18grams in, 25 seconds, 36 grams out. Maybe a tad overextracted. Either way really appreciate all the help and advice. https://www.youtube.com/watch?v=Sfls7nTCth8

Good to see you back up and running

ECM Puristika Issue

DavecUK

ECMP Thank you very much, at the moment ECM does not respond to my messages and my salesperson gives me long.

I know for a fact Michael will read it, and it has my original engineering reports attached. In my reports, I always identify problems and solutions. Unfortunately, they are private documents I cannot share. However, at least I can be assured he will be directly aware of this problem, with no filtering from his sales/marketing people.

It was Michael who sent me the machine 2 years ago and asked me if I would have a look at it.

ECMP

DavecUK Very very grateful.

Beverast

DavecUK Thank you very much for this.

DavecUK

Just had a call from Michael in Germany (owner of ECM and Profitec), he is now aware of the issue and the fix I recommended, so they will be testing and should sort this out with retailers once they are comfortable with it and how retailers, customers can fit it..

Beverast I would simply hang on to the machine and wait, this won’t happen all the time…there will be a solution for you. In the meantime, before switching off, ensure the expansion valve is in the 9 bar position….just in case it’s coming via that route and ensure the water isn’t below the inlet tube.

ECM are a great company and care very much about the quality of their machines, it’s one of the key drivers for them. At some point I will be going out to visit with them and have a chat to their engineers about futures and concepts, something I am looking forward to.

Beverast

Well, switched on the machine from cold for an afternoon shot and the group head is now hot without engaging the pump…

DavecUK Thanks for doing this Dave. Great that he actually called you direct. Will definitely take your advice regarding the expansion valve.

DavecUK

Beverast Yup, it doesn’t happen all the time…don’t worry a fix will come soon. It’s a lovely little machine, nothing like it on the market. I had to stay quiet about how much I liked it for years. I do have a mod you can do to make ownership even nicer…but I need to be careful, because I know ECM wouldn’t approve <lol>

DavecUK

Beverast Thanks for doing this Dave. Great that he actually called you direct.

No problem, it’s my hobby so I am glad to see things improve. I always used to think I toiled in relative obscurity until Host Milan 2019, I then found out loads of people in the industry knew of me…. I really with I could have gone to Host 2021 (damn covid). God willing, I hope to be at host 2023…which seems a lifetime away.

ECMP

Thank you DavecUK !
I’m glad to hear your news !
Exactly what you have commented is what I would have liked to hear from my seller once the problem was detected.
Fortunately, we were lucky enough to meet you on the forum so that we could bring the issue to ECM. Thank you very much again.
I have been dreaming for years that a manufacturer would “make the madness of making an exclusive machine for espresso”, so I did not want to return a machine that I like so much.
Thanks again for your contributions.

Evergreen88

I had the same issue of the grouphead not warming up with my ECM Classika. It went away by itself after a few days of usage.

DavecUK

Evergreen88 I had the same issue of the grouphead not warming up with my ECM Classika. It went away by itself after a few days of usage.

Often when a machine is new, there is some trapped air that needs to work through, expansion valves need to work for a bit to shape themselves to the seat etc. So it’s not unusual to find this. Ultimately though a design needs to make a themosyphon stall very difficult to happen or even induce.

e.g. if you lift the lever for 10s with the machine hot but switched off at night, you will pretty much guarantee a thermosyphon stall the next morning. A machine can, and should, be designed to partially/completely resist this.

It will all come good though….I wouldn’t worry about it..

Puristika

hi, some news from my puristika. I sent it back to my retailer. He opened the machine and saw that the boiler resistance had a problem. He just replaced it, I don’t know if it’s related to the thermosyphon problem, he still keeps it for a few days to test, but for the moment he no longer encounters the problem..![

DavecUK

Puristika I don’t know what the brown stuff is, is it some sort of leak, is it wet, was air getting in that way?

Puristika

Don’t know. He has just called me back to tell me that he has received an email few minutes ago from ECM concerning the thermosiphon stall problem. The e-mail says that they are aware and that they are preparing a communication on this subject.

Srv-02

Thank you, Dave for your referral to this thread and I am looking forward to the fix. It is not a deal breaker, but super annoying that I cannot rely on the machine to be hot after turning it on. Luckily, I got a group head thermometer, so i can handle it a little bit better.
I was the Reddit guy who suggested removing the o-ring on the reservoir, as the dealer suggested to me and was also instructed on an extra sheet inside the packaging. This was the only thing that popped into my mind. I guess, they also forgot to drill a vent hole into the lid.

I am curious in which direction your suggested mod goes. :) The only thing I could think of would be some direct plumbing, or using longer hoses to move the reservoir underneath the counter.

DavecUK

It’s exactly the same as my suggestion for the ACS Minima at the design stage. It’s why no minimas are ever reported to have thermosyphon stalls. It’s related to the introduction and increasing use of steel boilers.

PortafilterProcrastinator

DavecUK Fascinated, if you’re allowed to tell us. But totally understand if you aren’t.

DavecUK

PortafilterProcrastinator I have to leave it to ECM, they obviously have to test the fix then work out how to get it out to the installed base of machines….either for end user self fit, or dealer fit. if it’s done my way. I think the fix would take an end user about 20m from case of, to case back on. Easy enough to do, if you have the right part.

ECMP

I just opened my machine to see if the heater element had any leaks and luckily it’s perfect. I have taken the opportunity to check all the nuts connected to the tank and it seems that there is no leak. 🙂 Not having the machine leaks (it seems), the machine has the problem of the thermosyphon. We will have to wait for ECM to say something about it. 🤷🏻‍♂️

PortafilterProcrastinator

DavecUK Can you say anything about why it is (if it is) specific/ related to steel boilers?

DavecUK

PortafilterProcrastinator Can you say anything about why it is (if it is) specific/ related to steel boilers?

Not until they announce it…but it’s probably not what you might think…It’s more to do with the way they have to be made…big clue, the Vesuvius boilers are very expensive.

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