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noisey boiler worcester bosch 30 cdi?

I have a whirling noise in my boiler, it only occurs at times
I turn on the hot water tap and the noise stops for a while and start again. the noise is like someone drilling
Thank you

Roy Harris
April 2010
WorcesterHeating, Home Heating SystemsBoiler Worcester 30
Hi, this is Worcester, Bosch Group

Our technical team can help with enquiries - please call 0844 892 3366.

We look forward to helping you.

Worcester, Bosch Group
April 2010
noise probably coming from fan or pump, they're the only moving parts

Ian
April 2010
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