Hi, Can anyone help. I have a 13 month old baxi 105 e (not an instant) For the past month the boiler has been making a noise like someone running their finger around the rim of a glass. I have read a few of the answers on this site regarding noises. The noise does not go when you turn on the hot tap. the noise usually starts when the boiler is turned on and stops after about 1 to 2 mins and occassionaly comes on when the hot tap is turned on . Help?