Tumble drier tripping RCD

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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?
 
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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.

It could be absolutely anything, but what ever it was, has obviously blown itself clear. The pop, would suggest a suppression capacitor to me - usually a yellow plastic component, somewhere close to the mains supply input, or on the PCB, where the mains connects to it.

Replacing one - it absolutely must be replaced with an X-rated one, of the same voltage rating as the original.
 
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Like you said " a potential problem " it could hve been that condensation dripped onto an electrical component and blew itself clear. If you want to check for something see if there is any sign of dampness around electrical components. Element and motor would be somewhere to start if you need to.
 

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