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Deleted member 26818
It has been known for brand spanking new cookers to trip RCDs.I must be lucky then; the only appliance we've had that trips an RCD is the steam iron, when is filled with too much water.
I think you lot need to get down to Currys, and treat yourselves to some new appliances
It’s not dependant on the age of the cooker, just whether moisture as entered the element.
An element that hasn’t been used for some time is likely to absorbe moisture, just the same as a roll of Pyro will absorb moisture if the ends are not sealed.