hi,i was wondering if anyone could help me...i had a new fan fitted to my worcester boiler as it was not firing up so i had no heating or hot water...after it was fitted it started to make a louder humming sound,louder than i had noticed before...then a couple of days later,it cut out and i had to reset the button at the top as apparently this pops out and cuts off the boiler through overheating,i have had the same problem and had to reset the button at the top again by pressing it down..has anyone got any idea what the problem could be,i have tried phoning the guy that fitted the fan but to be honest,he doesnt seem to be interested in coming out again,said he would try and pop around today but he hasnt,i already have paid out 130 to him for the new fan to be fitted...