Boiler making banging sound

[Fallout]

Hi what can it be when a boiler is making a banging sound every 30 mins. Well did it twice till it was turned off. The boiler wasn't on for heating and no hot taps were open (Its a combi). I originally thought maybe kettling but ruled this out as the heating wasn't on. One other note the pressure had dropped down to 0. But guess this couldn't cause it?

 

[PrenticeBoyofDerry]

Well the boiler should not be on zero pressure for a start.
What type/make/model of boiler is it?
A common problem relates to the ignition electrode, but you will need a registered gas engineer to look at, legally you are not allowed to touch it, unless gas safe registered.

 

[Fallout]

Thanks,iIts a vokera maxin 24e. Yes will likely be getting a service just wanted to rule out the low pressure. And maybe get a general idea of what it maybe so don't get ripped off.

 

[ianmcd]

quite an old boiler so get someone who knows the boiler as it has a few quirks which wont be checked just doing an annual service, if it does the banging that you complain of try taking a video of it on your phone and post it on here and we should be able to help you out a bit better

 

[DP]

If you Employ a proper qualified heating engineer that takes pride in his work, can't see him ripping you off

 

[Agile]

Its the user responsibility to keep the pressure topped up to about 1.5 bar.

Don't understand why you don't think that's necessary.