Quote: Originally Posted by Bob_McBob /img/forum/go_quote.gif 88C is too low for espresso. The general temperature range is around 90-96C, and 93 would be typical. sorry, but that is not correct. CoffeeGeek - Espresso Discussions WholeLatteLove.com: Article: Rituals of Making Espresso Brewing Temperature: This is controlled by your machine’s thermostat. Our tests have shown that the machines we sell all fall within the proper temperature range of approximately 190 to 196 degrees so you do not have to consider this parameter when selecting a machine. Generally, you do not have to be concerned about this when you are operating the machine except under certain circumstances. I do not want to confuse you too much at this time, but as long as you watch your "ready lights" you will be just fine. converting my figure of 88C to F = 190. basically just the number they list. 196F = 91C and that is about the upper limit (I see my PID display reaching between 88 and 90 with peaks at 91 at times). it starts to taste a little burnt at 91 and higher. boiling is RIGHT OUT. ie, not to be done for espresso. pressure, yes; super high temp, no.