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Mend Riello RD3 Boiler Burner

riello rd 3 boiler burner unit?

last year i fited my new riello rd 3 boiler it worked fine up untill now ,
it has now got a hight pitch wine and it buzzes and hums when the boiler comes on it fires up ok,just this noise,can anyone help and tell me what it is and how to fix it pleases
many thanks martin

martin
December 2010
RielloRiello RD3Heating, Home Heating SystemsBoiler Burner Riello
can any one help me who know these boiller as this noise is doing my head in and it might be something simple pleases help
thanks

martin
December 2010

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