Tumble drier tripping RCD

Tumble drier tripping RCD

Tumble drier tripping RCD

I am looking at a potential problem with a tumble drier. It was reported to produce a loud pop during use before the electric was turned off by the RCD. Resetting the RCD returned everything to normal. I am trying to work out what had popped in the drier. Since it still works, I presume nothing in it was damaged. Any ideas please?

by DiyNutJob

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