Two weeks ago the residual current circuit breaker kept tripping out when I turned the tumble dryer on. Just incase it was a faulty socket I tried it in different sockets around the house but to no avail. Two days later the problem seemed to disappear and the dryer worked fine. Now two weeks later the washing machine seems to causing the residual current circuit breaker to trip. On inspection there appears to be carbon build up around the motor of the washing machine, either a cause or a result of the RCCB tripping. Now the tumble dryer which was running quite happily has tripped the RCCB during mid cycle. Now neither appliance will work without the RCCB tripping. Am I just unlucky and have both appliances failed together or is the problem the household electrics?