I have a Sabre 24 combi boiler....about 4 years old....when I turn on hot taps I am getting a whistling noise coming from the system. Has anyone any idea as to the cause of this problem and how it may be rectified. Noise is coming from the vicinity of the boiler itself. Thank you.

Dave 1314, June 2009

you have a scale heat exchanger needs to be clean or re placed

capitalboilers.co.uk, June 2009