Im having the same problem with a Tefal. The base appears to be a sealed unit, with special screws.
Ive had as many Generator irons for my business use and usually throw them away when they play up. But in this time of recession repairs are necessary.
bizzybee
August 2011
Automatic Answer
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howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix steam irons.