Boiler repair - call in the specialist
There are repair jobs, that almost anyone can do themself, but broken boiler isn't one of them. 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. He is aware of the risks involved and already knows how to avoid any mistakes. All you need to do is coffee and maybe some snacks, while he do his job.
If you are not convinced by this, and ready to repair you boiler alone, all i have to add is this: search the internet for movies of exploding boilers, I dare you.
Water isn't going in the outflow...
Even though we landed on the moon and are able to comunicate freely across the globe in real time, we still are sometimes stumped by mundane things like clogged pipes - what do we do then, in our hi-tech, modern times?
The same thing as always - call in the plumber. There maybe quicker and cheaper solutions, of course - but unless you are sure that drain cleaner isn't going to melt your pipes, or actually just do what it is supposed to, it is better to leave it to professionals.
There are some things, in the pipes, that you don't want to see - trust me on that. Besides, expert plumber can always recommend what to do, to avoid this kind of situation, and which products to use if need be.
Other than that, it usually takes something more sophisticated than a plunger, to get rid of the clog - if you even have that to begin with. So don't fret, or take this as an insult to your aptitude, and contact with plumbing services.
Calling Plumber or doing it yourself?
When it comes to repairing things around the house, men often feel compelled to do it themselves, rather than spent money on overpriced expert. More often than not, it is worth the effort, but what happens when you mess with crucial installations, that you know very little about?
Broken chair or squeaky hinges are one thing, but if you mess up with your drainage or plumbing, all hell can break loose. From time to time, it is really wise to call in the plumber - you may pay more than you would want to, but not necessary more than it is worth. Especially if you would do this yourself and mess up.
Besides, do you really have all the necessary things for all the repairs? I doubt that, let alone the tools, which you may or may not have. If you buy unnecessary spare part, what will you do with it? Plumber can always use it, but he probably wouldn't make the mistake in the first place.
To sum up, it is good to do things around your house by yourself, but don't be afraid to call in the specialist from time to time.