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Old 09-27-2012, 02:50 PM
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There are two pumps with motors - the drain pump and the circulation pump. Also that noise could come from the water inlet valve. Remove the bottom panel and try to pinpoint the noise.

Here are the breakdown diagrams and Replacement parts for Bosch SHU4302 UC/06 (FD 7705-7912) | AppliancePartsPros.com

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