I am trying a much lighter roast and set the machine to the 1 position (from the previous 0). I did this last night after turning the machine off so my smart plug would turn the machine back on at 7:00AM and I would have my Marax brewing by 7:45, ample time for heating. Well… I noted that my first coffee was waaaay to cold from the previous 0 position. Went to work, left the machine ON. came back at five and brewed a ristretto at 15g in, 15g out and aiming at 15″. Nailed it. BUT… coffee was still warm, not hot. I am not a fan of steaming hot drinks and I usually let my coffee sit for about a minute before I reach for it. But in this case it was again below the right temperature.
With the switch at 0 position it was very hot, I would say about 91º, but not the right taste. This is why I wanted to try the 1 position. But then this happened.
I have noticed that the machine ramps up to 11 bars for two seconds and then flushes water into the tray from the back. It does this randomly about once or twice every few hours, the same thing it does when it reaches the right temperature after turning it on.
Would you have any thoughts as to what his is happening?
Thank you for your comments.