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Vaillant ecomax828/2e, noise?

My boiler makes a racket when the hot water is turned on. Its as if there is a foreign object in the boiler. It recently started to make the noise when the heating is on as well. What can that noise be? HELP!!!

JAY
November 2011
VaillantHeating, Home Heating Systems
Possibly pump or fan, take off the front cover and listen to either/both (one will be making the noise), 1st suspect being the pump.

Carefree
November 2011
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Vaillant F22 fault?
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Vaillant ecoTEC 831 Plus

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