A haven dedicated to manual espresso machine aficionados.
Yeah, my 2020 Cremina is set for .8-.9 and every once in a while races up to 1.2 -1.3 bars and then settles back down. It's a bit disconcerting but seems infrequent and it corrects itself, so far at least.
My SL wound up to 1.7 once, freaked me out, but haven't seen it do it again, although I'm not always looking at it and have it on for about 2-3 hours in the morning
Lever User Since 1985
I think you hit the nail square in the head there - unless you obsessively watch every cycle of the boiler I suspect most of us would miss the occasional deadband overshoot.
You could try to source one of the original Olympia Pstats. they are a bit bulky, and might be a tight fit. but they are very sensitive. i have a hysteresis of less than 0.1 bar (swings between 0.7-0.8 on my Olympia Club). they contain a copper bellow which is not actually made of copper, but of 'unobtainium'. once your copper bellow leaks, the whole pstat turns into a strange paperweight. but as long as they work, they work great!
Lean Mean Caffeine Machine
Yes, I've heard and seen those pstats in older posts. It strikes me as funny that they create a machine that is built for a small eternity - only to put a $37 pstat in it......
newbie question but how are you folks measuring and monitoring your pstats? Is this problem unique to the SL or does it also carry over into the non-SL versions?
Speaking for myself, I just happened to be prepping a shot when I noticed the pressure gauge had overshot the machines deadband. So I kept an eye on the gauge whenever I noticed the boiler cycling to see where the needle went. Searching the HB forums has led me to conclude that these mater pstats vary a lot in terms of variation in deadband and lifespan. CEME pstats also seem to be a little quirky, from what I've read. So no, I don't think it is unique to the SL - just to this type of pstat. It does seem to be the SL's weakest link, though.