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Hi everyone, my Miele W1712 recently always show up F53 fault, and the motor run faster than it should be. When in washing cycle, the drum should run in very slow speed, however it sometimes run in fast, which makes the machine shakes horrible. I searched on internet, which said F53 fault is the speed sensor. But I also read many people fixed the F53 fault by changing the motor carbon brushes. I am totally confused, how come carbon brushes issue is deal with the speed sensor problem. If the brushes is failed, motor should not run at all, why run faster? Can anyone give me some idea? Thanks a lot.

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I agree. If the motor is running fast check the tacho magnet on the motor. If it comes loose or breaks the PCB can’t control the motor. For more details about tacho coils and magnets check my article in Whitegoodshelp - 

This article is not specifically about Miele but should still be relevant if a tacho coil is fitted https://www.whitegoodshelp.co.uk/hoover-nextra-error-code-7/


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Yes. You wouldn’t replace carbon brushes without examining them anyway. If they look ok, are a decent size and not charred there can’t possibly be anything wrong with them. 

diagnosing carbon brushes 

Many motors don’t even have carbon brushes btw. 


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Warning:  Read this before attempting any diy repairsNo representations or warranties are made (express or implied) as to the reliability, accuracy or completeness of advice. I can't be held liable for any loss arising directly or indirectly from the use of, or any action taken in reliance on, any information on this website, which is given free of charge and in good faith.

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