Boiler heats up but water only comes out...

If you remove the top panel of the espresso machine and look at the groupheads, there will be a large nut on the top, within that nut there is a microfilter and a small jet(make sure the water to the machine is turned off and the machine is cooled before removing nut).The jet might be clogged(I have actually seen sand in some models), use a paper clip or pipe cleaner to clear, then slowly turn on the water valve to flush out chamber, or use a wet/dry vac. After you have cleared jet if you still have no water flow, move to the solenoid(black electrical box connected to group, on your machine I think it is under the group you might to remove the front panel to reach it). Place a finger on the box and run the group you will feel the magnet activating, this tells you that the solenoid is working. Remove box it has a 14mm nut on the discharge, once again make sure water is turned off, using a wrench remove the silver pipe fitting that is connected to the square brass fitting(brass fitting sits on the group with 4 screws holding it in place some manufactures uest 2 screws at opposite ends). When you remove the silver part of solenoid turn on water slowly, if no water shoots out then use a paper clip to clear out the middle hole in the square brass connection.