In the past I have had a lot of success asking questions of the Repair Guru at Repair Clinic (I am not affiliated in any way except as a satisfied customer). You email them a question and within a day or two they get back to you with an answer. Not all of my questions were obviously going to lead to me purchasing any parts, but they were very helpful anyway. They may or may not have your manual available (a quick search of their site didn't reveal anything by Ilve, but I'm willing to bet they could help.
To ask a question, click this link and in the upper right, click one-to-one Repair Guru emails in the blue circle.
You have to register, but it's only so they can assign you a case and you can easily get back to it. I use firstname.lastname@example.org formatting with my gmail address and no spam originated from them when I signed up a couple years ago.