Hello "Chrisa"
Welcome to the Coffee Forums website!
Is Formula EVD-2 the whole name of the model espresso machine that you have, or is there more to it? (such as Altair, or Wega, or something else)
I'm guessing that you don't have a user manual for the machine. How old is it?
We have several members of this Coffee Forum who have experience with maintenance and repairs for espresso machines. Hopefully someone will be able to give you some suggestions soon.
Rose