apollo boiler probs

[lpn]

HELP PLEASE. my apollo is kettling loudly, more so when hot water is on.is also banging after kettling sound.4 rads upstairs ok but 3 downstairs are cold(inlet pipes are cold) have just replaced pump and this seems to be working ok (.sometimes sounds like plane going overhead )

need some advice please guys

 

[Agile]

You should read all about it on this forum.

Its usually caused by over gassing ( needs CORGI ) or a build up of scale.

Its now an old boiler and will probably need replacing or professional attention to descale it.

Tony

 

[lpn]

thanks for your advice. put in f2 now only have the plane landing. think your right abot pro