Why Is My Boiler Making Noises Until The Hot Tap Is On Then Quietens Down

[joanne2002]

Hi,
I have a worcester bosch 24i combi which is making a lot of noise. We have replaced the pump the pressure relief as it was all scaled up and stopped the dripping out the back wall with new valve. WHAT HAPPENS IF WE PUT ON HEATING MAKES A LOT OF NOISE NOT REALLY BANGING NOISES THOUGH AND IF I LET THE HOT TAP RUN IT GOES QUIET, last night it stayed quiet but tonight not so...Is it maybe the heat exchanger ? thanks in advance ( glad i found this site )....Jo

[The Builder]

I've replied on your other thread Jo.
No need to duplicate your Q in another section though. One of us will always see it :o)