Air Maybe In Boiler But When Hot Water On 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 ? it sounds like its gurgling away ..thanks in advance ( glad i found this site )....Jo

[serviceteam]

Hello Jo,

If it's a Worcester Bosch 24i HE, then the heat exhanger will require bleeding as there is air in the system. As you've already replaced the pump you need to vent the system properly. This should cure your banging boiler noises.

If it's the other version, i.e. not the HE, it's probably the same problem but you might need to call an engineer if that doesn't work.