Loud Banging/Knocking Sound when Boiler Powered on

[klsbatb]

Hi, I just got the keys to my new flat today and when I turned on the power to the boiler it instantly started kicking out a really loud clicking/banging/knocking sound. The boiler is in the loft so I went up and noticed that the pressure gauge is bouncing in time with the sound.

I've closed and released every valve I can think of but I just can't get it to stop. I can increase the pressure with the usual valve (intake? Im not sure on the names) and I can drop it again by bleeding the radiators. The radiators seem to be heating up and the water seems to be getting hot so its working but it's just making this constant sound. When I first turned it on it didnt seem to fire up but on the second attempt it did.

I've attached a video of the gauge jumping and banging. I'm pretty sure the boiler is an Ideal Evo HE C22/30

If anyone has any ideas of what to do it would I'd be incredibly grateful.

 

[king of pipes]

Needs a gas Safe engineer it could possibly be trapped air or a pump issue . Kop

 

[klsbatb]

Needs a Registered Gas Engineer it could possibly be trapped air or a pump issue . Kop

Thanks that’s what I thought. Just figured I’d ask on the off chance it was something simple. Will contact one this morning.

 

[MikeJhn]

If this issue was there when you bought the flat, it was the responsibility of the previous owner to inform you of this defect, in the first instance contact the Estate Agent if you don't get any joy from then, contact your Solicitor, it should have been declared on the know defect form.