I'm facing any troubles about my NS oscar.
I uploaded the movie on Youtube.http://www.youtube.com/watch?v=EmxoLXNcPiU
When press the brew button, little water with steam come out from the group head.
After few seconds, only water come out normally.
After 30-40 seconds, the water doesn't come out, and after a few more seconds, the water come out again.
I think oscar have any problems because it should normally constant water continues to come out until the water reservoir is empty.
I tried to disassemble and clean the 3-way solenoid valve.
And I replaced the expansion valve from 98120001 to 73012002.
But this behavior didn't change.
Next, I will try to replace the pump.
Do you have any ideas for solve this problem?