There is the element seal/o ring. Undo the 3 hex nuts and you'll see it. Fit a new seal and you should be back in business. You may get away with just tightening the bolts!
Yeah, I'll try that first!
Seal 8 is the seal that will probably be at fault. It seals the heating element to the boiler which contains the water.
@anidel started
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There is the element seal/o ring. Undo the 3 hex nuts and you'll see it. Fit a new seal and you should be back in business. You may get away with just tightening the bolts!