How can I repair my Gener.8 Max1 Steam Iron ? please x?

When the steam is used the house fuse cuts out. The iron can be used without this problem as long as steam is not. I love the iron and as such a pricey one I would sooner repair, I couldn't afford another. The iron is not old and has been very well looked after. I have checked the socket usually used and the plug wiring. Anything else I am afraid is beyond me. Please please can anyone help me ?