Can anybody help, whats up with this boiler please

[discomark10]

I thought it would be best to show you a lil video of the problem.
Its just super noisy! Ive been told its kettling but not sure on what that is or what needs to be done to fix it?

http://youtu.be/tbDaE0wTHT4

 

[patsmotors]

circulation.

 

[45yearsagasman]

Start with checking that your pump is working correctly, I'll bet it isn't.

 

[discomark10]

So today i replaced the leaking valve next to the pump and did the other one too as it was off, replaced a rad valve, checked the 3 way valve, aok.
The pump works great. dam pilot wont start now, the spark is week so got to replace the piezo device.

 

[libby lou lou]

How would you know the spark is weak?

 

[mickyg]

How would you know the spark is weak?

cos the pilot doesnt light

 

[Agile]

He said the spark was week !

 

[Agile]

He said the spark was week !

 

[namsag]

That noise is caused by either the pump not working or the thermostat allowing the water to get too hot.

The pump on these are controlled from a pump over run stat on the boiler and its a common fault that they play up, especially from cold .
The boiler will bang and thump till the stat senses temp within the boiler case and switches over giving power to the pump.
They will sometimes drop out during normal use and cut power to pump.
When it does the noise check the pump for 240 if its not there you know stat is at fault.

Actual boiler stats are 2 seperate stat hi and lo not an expensive part if its one of those that have gone allowing it to get too hot

 

[discomark10]

ok ive checked the pump, defo working, mesured the temp coming out of the boiler, gets to about 75c on low then cuts off.
I think the kettling is down to air that wont come up to a bleed point.
New problem thermo couple has gone as pilot is cutting out. once i get that sorted i will try again and get rid of any air.

 

[mickyg]

pilot is cutting out cos its overheating, circulation problem as already said

 

[discomark10]

no the boiler is cold, but still cutting the pilot out.

 

[MrGassafe]

He said the spark was week !

Two weeks?
That's a fortnight!

 

[libby lou lou]

Sounds like the cat is locked in there, you can here it meow at 22 secs

 

[Boilerman2]

As the ovewrheat stat has operated so many times you will probaly find that the pil;ot wont light cos the overheat stat has gone open circuit