Repairing boilers, heating systems, leaking pipes and drainage is our thing - check our website =>
The word "plumber" dates from the Roman Empire. The Latin for lead is plumbum. Roman roofs used lead in conduits and drain pipes and some were also covered with lead, lead was also used for piping and for making baths. In medieval times anyone who worked with lead was referred to as a plumber as can be seen from an extract of workmen fixing a roof in Westminster Palace and were referred to as plumbers "To Gilbert de Westminster, plumber, working about the roof of the pantry of the little hall, covering it with lead, and about various defects in the roof of the little hall". Thus a person with expertise in working with lead was first known as a Plumbarius which was later shortened to plumber.Źródło: https://en.wikipedia.org/wiki/Plumber
Boiling hot water and immense pressure - those are the things that define boiler, and also the things you should be wary of. Calling in professional plumber isn't any shame in this case, it is necessesity.
It is different from a ticking bomb, but close enough, especially if the safety valves are at fault.
All in all, you need expert on this - let him do his job, and relax.
Because of it, they were able to deduce what the problem is quickly, and if it is easy to fix, they make it look like it's nothing.
It may escape your attention, but they more often than not, use special tools when doing so.