Yes, YOU can help.
Have a look in the manual.
Not got one?
Work out the make and model of your boiler - let's call them Make and Model, shall we?
Do a Google search for - say - "Make Model Manual". You could even just go straight to the makers site and see if you can find it there.
Does the manual help? Maybe.
If you still need help you could try another Google search for - say - "Make Model F22"
If you still need help, you could try to find a dedictaed plumbers forum
Anon
January 2017