banging noise from boiler

[mobile chicane]

Hello all, right down to buisness I have a boiler that when running has a banging noise a bit like a "buh.....buh.buh...buh" the flame pic through the observation window is fine and I slackened off the bleed screw on the heating coil inside the burner but there apeared to be no trapped air, I think its a problem with the water boiling in the pipe and not moving round the system quick enough as the sound seems like a kettle boiling.

the boiler is a glowworm fuell saver F, its quite old ( 15yrs + at a guess ) but seems to fire up ok every time, I havent taken the gas pressures yet as I dont have the manual but it was set up by a decent corgi guy about 2 +1/2 yrs ago the fault has been prescent for about 9 months but its waking me up now so I need to do somthing about it


any sugestions ?

 

[Mike Jackson]

As you say the problem is lack of flow through the boiler. Most likely causes are system sludged or scaled up or pump on it's way out.

Mike

 

[mobile chicane]

just de furred the pipes with some cheap stuff from screwfix and it seems to have done the trick