You see, the thing about boilers is, you got several different types. I find a combination boiler to be the most effective, as it allows you to heat both hot water taps and run a shower consecutively without waiting for water to reheat. You must try and keep the pressure between 1 and 2 BAR and make sure it's serviced around every 6 months, as dust often settles inside the boiler, causing it to not ignite.
Possible causes of boiler breakdown you ask? well the circuit board can often fry, this is a cheap replacement, but servi...
...Dammit Asir, get off my PC! Gawd, anyway, you were talking about pr0n?