Boiler making buzzing noise!

[whitworth77]

Hi

I have a Worcester 28i combi boiler. It has started making a whirring/buzzing noise. The pressure keeps climbing slowly too. I keep bleeding the radiators to drop the pressure but the bussing doesn't stop.
I can get a plumber out tomorrow as it is insured, but does anyone know whether the problem could be dangerous?

Thanks!

 

[gasmarc]

no more than likely its the fan that is making the noise there should be no safety issues

 

[Billy Bob Bob]

unless the fan seizes ,it should blow a fast fuse

 

[gasmarc]

melted venturi comes to mind which i had on a vaillant fan which i only found out after buying the knew one, worth keeping in mind