Hi i have a boilermate ii that is 7 years old and gives an annoying 15sec buz intermittantly. I was thinking of getting British Gas boiler cover, but it appears that this problem is common amongst Wimpey Home dwelllers. I have been told to change the controller cards (PCB), but the quotes I am getting are some £80 and above - is this correct? Has the problem been adequately diagnosed, or should I seek expert guidance?