I have a worcester bosch 27he condensing boiler fitted. It works very well. However, over the past couple of months where the pipes come through the ceiling there is a clicking sound every now and again and it is getting more frequent and louder. I used to have a baxi bermuda back boiler fitted. The worcester boiler is installed where the cylinder used to be. The condensing pipe also comes through the ceiling and runs into a soakaway under the floor.
Any suggestions would be much appreciated as it is driving us mad.