Which "fuse" tripped? The circuit breaker for the sockets (usually a single breaker maybe 2cm wide) or was it the earth leakage breaker (usually a breaker maybe 4cm wide, often with a "test"button)?
My money would be that there has been an internal leak which has caused the big breaker to trip. There's probably little you can do but if you can check for moisture inside.
It may even be a failed element.
I'd be sorely tempted to replace, with a decent warranty, rather than repair, with no warranty.
That way your wife's eyes will be more likely to light up with love rather than from a shock.
Jffgjjg, July 2023