Tim, my Baxi hasn't ever made much noise only really a gentle hum. I don't have to sleep near it but none of my housemates have ever complained. Obviously the usual clicking sounds occur on fire up. It did make a racket when it reached boiling before killing my tank.
The reason for Baxi is...
Heating Engineer visited this morning and merely laughed at my boiler. He must have listed 20 things that were wrong with the original installation. Including putting a 22mm pipe connecting into a 15mm further down the route, no thermostatic control, incorrectly sized boiler for 8 radiators and...
Thats the point the guys who tried to fix the boiler originally were so called heating engineers. The guy who actually diagonosed the problem was a plumber!!! He wasn't Corgi registered so couldn't fix the problem but he was extremely knowledgable about the boiler as he had one himself...
I had been experiencing the lockout/overheat problem for the last few weeks when this weekend disaster struck. Having had THREE visits from a local plumber and numerous tinkering, the header tank collapsed. The reason for the collapse - the boiler kept showing the lockout light lit up but...