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Connecting a raclette appliance or an electric paella pan will blow the RCD. Yet this one is 20 A. The problem is recent. Where can it come from? Should I change the circuit breaker?

It is possible that the problem comes from the plug or electric cable which feeds this catch.
It can also be a lack of insulation of one of the driverswhich would cause a "leak" at ground level that would trigger the differential.
The differential may also be involved, but it is more rare.
The best would be have the installation tested by an electrician.

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