Please help, loud clanking noise from heat exchanger/boiler?

[hsadat]

Hi guys

My boiler has been making a strange clanking noise which sounds concerning. Below is a link to a video where I recorded the noise. Any ideas what’s happening ? Currently chasing the landlord to get someone to look at it. Thanks

Clanking boiler sound - https://youtube.com/shorts/DagA5pXhOfg?feature=share

 

[ShaunCorbs]

Sounds like a circulation issue/ is there water in the system pic of the boiler ?

Eg overheat

 

[Ric2013]

To me, the noise sounds like an issue I've come across on a late 1980s boiler. Boiler was kettling slightly and the resultant gasses would block the flow pipe when the system came on. This was due to poor pipework run design that did not self-vent. The boiler would then bang when it tried to fire, the pump could not shift the air/steam lock, and the boiler would then overheat and would turn its pilot light out as a safety response. Ultimately the problem was handled by fitting an air separator to treat the symptom.

The owner had previously just turned the heating off for a bit when it did it, but said it didn't do it very often.

 

[hsadat]

To me, the noise sounds like an issue I've come across on a late 1980s boiler. Boiler was kettling slightly and the resultant gasses would block the flow pipe when the system came on. This was due to poor pipework run design that did not self-vent. The boiler would then bang when it tried to fire, the pump could not shift the air/steam lock, and the boiler would then overheat and would turn its pilot light out as a safety response. Ultimately the problem was handled by fitting an air separator to treat the symptom.

The owner had previously just turned the heating off for a bit when it did it, but said it didn't do it very often.

Turns out the problem was in the pump! British Gas guy replaced it and now it’s working fine. Thank you all for your responses though