UK Appliance Repair Questions? Ask a Technician for Answers ASAP
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That is the pump and if it is that noisy you need to replace it. Often the impeller gets loose and starts making a lot of noise grinding in sounds. Here is a link to a new one for you, you would have to remove the top, control console and front to get at it to change it out...or if you are pretty handy you can do it through the back access panel..but it is a pain to do that way.