What Plumber/Gas Engineer Is Right?!

[Bakeyournoodle]

Hi there.
I've having a problem with my Potterton Prime 50F boiler - it is quite old, but have served us well so far.

So in short... it doesn't quite start properly. You hear the fan whirring, but it takes a few clicks and cycles until the flame eventually starts. It then goes on for around 2-5mintues, before i hear lots of bangs and it stops.. it definitely is overheating/kettling?

Now, I know the pump upstairs needs replacing, but I've had two gas experts come in with different conclusions on the boiler.

1) the flue & fan needs replacing

2) the pcb needs replacing....

Can anyone tell me which one is the most likely cause?

 

[newbuildinstaller]

if the pump needs replaced....


REPLACE THE PUMP


and see where you stand

 

[neiltheplumber]

Pump for me too! If it's banging its probably because the heat cannot be moved from the boiler quick enough which results in banging because the water is literally boiling/kettling. Also a dirty system can cause the same problem and therefore the boiler will struggle to push the heat around the heating system.

 

[GavThePlumber]

Is this another troll account?