...split from How to adjust an espresso machine pressurestat by moderator...
I think I messed up my MA-TER pressurestat.
First off when I first adjusted it (because my brew was not hot enough) - it "felt" like it had a stop lock in the thread. ( A point where I could not screw down anymore) - but I seem to made that stop lock disappear; possibly just old plastic or grime build up - I don't know if it's really relevant - but the screw is now totally "screwable" all the way down to the brass steam pressure release part and all the way out.
But after I turned the screw to maximum and then backed off a little (the machine was off) - I turned on the machine again. Looked good, ton o' steam pressure and the safety reset button was not being flipped on. So now the brew test. And here's the problem...
The flow of the water just flew through the portafilter. I was using same dose and same tamp before and was getting 25 secs. Now I was lucky to get 10 secs. I adjust my grind finer and tamped more - and I stretched the flow to about 20 secs but the coffee was the worst. Super bitter. So I did some reading and maybe I adjusted the p-stat too much and too much heat. Well since I adjusted it so much I failed to mark my starting point of adjustment and had to guess. I backed off and backed off the p-stat now about 5 times and I'm still getting fast flow. It's times like this I wish the Oscar had a pressure and temperature gauge and I grumble about engineers.
So now I have this great machine and I'm unsure what I did but I can't make it go back to the way it was because there is no "default" position of the adjustment screw on the p-stat.
Does anyone know how many 360 degree revolutions backwards from "all the way screwed down" to "default" is? I can remove the brass adjustment screw completely for what its worth. Or did I break my p-stat? And is it "normal" for a little bit of steam to be hissing/dripping from the brass pressure stat valve?
Any idea as always appreciated.