I had the same issue. If I poured 8 cups of water in the reservoir, I would only get maybe 4 cups of coffee, the rest boiled off as steam. In my case, it was an easy fix. Open the water reservoir and remove the black plastic water filter holder. Below the filter, there is a port where the water gets drawn into the boiler. In my case, there was a single coffee bean wedged sideways in the port, blocking off nearly all water flow. I fished out the bean with a metal pick, reinstalled the water filter, and the machine worked like new.
SOURCE: descaled machine, clean solenoid valve. now steam is coming
try replaced gasket in high pressure valve.
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SOURCE: No steam on Capresso Impressa S8
Most likely problem is over temp cut out switch. Small diode attached to the boiler to prevent damage during boil dry, or fault in the heating element itself. Difficult machines to repair and best handled by a service technician.
SOURCE: Steam comes out strong for 25 seconds, then almost
Check the thermostats on the steam boiler, one of them is not working, also check the main board for damage, if the pump is not pulsing when you are steaming.
SOURCE: Jura Capresso Impressa S9- no steam
I had a similar problem. I took off the side and rear cover, followed the hose that comes from the steam wand to the rear of hte unit. It enters a solenoid made by ACL Italy. I dismantled the solenoid unit by disconnecting the two hose ends, removing the relay, and unscrewing the plunger unit (vertical pipe). The plunger unit internals should move freely up and down like a piston in a cylinder , powered by a small spring. In my unit, this plunger was calcified and seized. I soaked it in boiling water and pressed on it gently several times and it unstuck. I put it all back together again and presto! Good luck
SOURCE: Gaggia Syncrony logic rapid steam machine leaks water from bottom
Check the chamber under the white plastic valve behind the brew unit, it might be blocked with coffee.
All Jura machines in the series C, E, F, J, S & Z models have the same problem. The Jura recommended maintenance is insufficient or erroneous:
1- When new machine is set up, the owners click OK for use of Filter cartridges. This helps only to display reminders for replacing the filter.
2- The instruction also advises, regular use of Filters, eliminates descaling the machine. That is not accurate. Reminders for descaling are delayed or eliminated. This allows accumulation of Calcium deposits in the entire hydraulic and coffee system.
3- Cleaning tables recommended & sold by Jura do not remove Calcium deposits in the coffee/water passages. The automatic descaling method recommended by Jura also leaves the coffee side of the machine unclean. The error message in your machine is due to Calcium deposits in the Brew group, coffee outlet & the faucet dispensing coffee in the cup. I suggest all Jura machine owners should manually descale machine. Manually descaling includes use of 6 to 10 rinse cycles with descaling solution in the water tank. The error message "Clean Machine" is accurate & pointing to descaling the Brew group, coffee outlet tube and coffee dispensing faucet by using rinse cycles.
After the rinse cycles are complete, refill Descaling solution & continue descaling the rest of the machine using hot water dispensing function, until the tank is empty. Finally, give a final flushing of machine to flush out remaining descaling solution inside the machine.
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