In my experience modern steam irons are amongst the more difficult appliances to fix. If you have relatively little appliance repair experience, then I recommend you approach any dealer selling Tefal irons & have them advise you who is your nearest athorised repair specialist.
Repairs are often in the order of half the price of a new iron, so if you have had a couple of years service from your iron, the most cost effective solution may be outright replacement.
Pete
Peter Owens, February 2007