: Is there a way to diagnose and pinpoint the issue with the control box?
It seems like there is pressure even though the gauge is stuck. I am able to get water out of the water dispenser and water/steam out of the steam wand. When I was descaling, I used a blind basket and was able to get some pressure at the group head and a little bit of water kicked out of the 3-way valve at the bottom. I have done minor work on my Rancilio Silvia (i.e. Upgraded steam wand, and replaced group gasket, etc), but I am new when it comes to espresso machine rebuilds. Is there a simple way to test the safety relay? I'm interested to hear any thoughts or advice from the experienced mechanics! Thanks