Hello!
I've been away and before i went I had a frozen condensing pipe. The pipe has been left disconnected from the drain for a week. When I returned home I have a sound like running water, I have tried resetting the boiler, have reconnected the condensing pipe. The boiler is a Worcester Bosch system boiler. I have even left the boiler switched off for an hour but the sound continues.Any ideas would be helpful.
Cheers.