Here's our guide to try and help fix a blocked steam generator iron. We needed a torx 10 security bit (screwdriver) which has a recess in the end for the dimple on the tory screw to fit into......about £5 on ebay. The little micro pump is 220volt and 15watt and the cheapest we saw was just under £13 again on ebay. Ours is a Swan iron but I suspect similar priced ones are much the same design. If you are in a hard water area you may need to replace the pump altogether if it's badly blocked. A tip is to run some dilute white vinegar through the iron as a preventative to limescale build up...but you already knew that. Apologies for any unintentional mansplaining. Obviously, unplug from the mains and get someone handy or qualified if you're unsure. Hope this helps.