Coffee is lukewarm though the gauge is fine

Coffee is lukewarm though the gauge reads 1 to 1.2 bar

The manual: the pressure reading is false. A technician should check the "airhole valve" (a vacuum breaker). Meanwhile, at switch-on, open the steam lever and leave it open until the boiler scale goes back to 0, so the element heats fully. The manual says do this daily.

Bezzera BZ10: every job