Question about Rancilio Silvia Espresso Machine
The pressure is from zero to the opening pressure of the OPV. This should be about 10 bar when the OPV is cold. When the OPV is hot, the OPV spring is hot and a little more flexible. The OPV opens at about 8.5 bar when hot.
When the wand valve is open, you can get a lot of steam or water with not a lot of pressure in the boiler.
Take the lid off the reservoir and watch the hose from the OPV. It's the short hose.
Pull a shot with less than usual coffee in the basket.
If you see water flowing from the hose, the OPV opened.
If it did not open and there is little extract in your cup, buy a new pump.
Posted on Jun 08, 2014
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Posted on Jan 02, 2017
I had the same problem. I took the steam wand off, and checked for steam out of the unit. It was OK, so I stuck a thin wire up through the steam wand and dislodged what look like pieces of a green washer or O-ring.
In short...the wand was plugged.
Posted on Feb 03, 2009
Hi. Make sure all your buttons are off. (switches all facing the same direction). Then make sure the tap is turned off. Switch main power on. Then switch the coffee on. you should hear the pump start. usually loud at 1st, then it will get quiter as the water is pumped up through the group head. When water is pouring through the group head, switch off the coffee button. Now let it finish heating. If you can get to this stage, then everything is ok. If you cant get it to this stage then you have a problem with the machine. Most likely a themostat on the boiler. Darryn REPAIRER
Posted on Sep 24, 2011
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