Cannot ventilate machine
Cannot "ventilate" machine, when side knob is turned is states " close knob" and then back to "ventilate". Also, doesn't seem to heat the milk up very well
Coffee Makers & Espresso... - Gaggia - Titanium Espresso Machine
Answers & Comments
Sounds like the milk frother is blocked.
Remove the frother completely,try to ventilate without it.
You should be able to see through the center of the frother.
If not try to clean it out with a paperclip or pipe cleaner.