Rented property - Boiler banging when firing up, gas man says it's fine?

HopelesslyHopeless

I'm not usually one to argue with a professional, but this one may be an exception. We've been having issues with our boiler in a rented property for the last few months. The landlord has sent their go-to guy round to it and on both occasions he has told us the almighty banging sound that the boiler makes when firing up is totally normal.

It doesn't do it every time it turns on but it's doing it enough to be alarming. The longest it's gone so far before firing up after the fans and pumps have kicked in and it's started "whirring" away is 8 seconds and boy oh boy was that an ALMIGHTY bang! All the other times the banging has occured has been about 3-4 seconds since all the whirring from the pumps/fans started.

Is this something I should be alarmed about? He's obviously the gas engineer and knows how these things work but at the same time... A simple Google search for "boiler banging sound" mentions something about delayed ignition which can damage the boiler. It also passed gas safety last month with the same issue and the same guy did the safety check.

Am I right to be concerned or would you say I'm panicking over nothing? If it is a fault, what will happen if the gas man keeps ignoring it? 

Rocksolid

Ask someone else to review the boiler, then you send the analysis and bill to the previous company!

Norman_Castle

Mines done the same for 10 years.

Alter_ego

Mine did it in previous house. It was the fan windings breaking down and intermittently shorting out.

Tracet74

I had a similar situation but it was actually the pipes, not the boiler.  I knew it would make a horrendous noise until it warmed up but wasn't a defect with the boiler.

jefaz07

I’d be 99% sure it’s explosive ignition. The probes need changing. The spark gap has become too big. 

Is the flue on the ground floor outside? Go out during this and see how bad of a smell of gas you get. 

youth_leader

My pipes, not the boiler, used to bang and my heating engineer told me it was hydrogen gas, apparently through corrosion.  The boiler was twenty years old, radiators even older.  We'd never flushed them out  as worried they'd fall apart when dismantled, didn't have the money to replace.  

rik111

Why not just book and pay for your own service, should only be about £60.00, if anything seriously wrong you can the take it up with the landlord.
Seems an obvious solution to me but I know Tenants don’t like thinking for themselves....

HopelesslyHopeless

rik111 said:

Why not just book and pay for your own service, should only be about £60.00, if anything seriously wrong you can the take it up with the landlord.
Seems an obvious solution to me but I know Tenants don’t like thinking for themselves....

Oh let's see shall we... Because it's not my property maybe? Oh and because it also forbids it in the tenancy agreement... Always one keyboard warrior!

NameUnavailable

Kettling

https://idealboilers.com/tips-and-advice/what-is-kettling-in-a-boiler-is-it-dangerous

[Deleted User]

HopelesslyHopeless said:

rik111 said:

Why not just book and pay for your own service, should only be about £60.00, if anything seriously wrong you can the take it up with the landlord.
Seems an obvious solution to me but I know Tenants don’t like thinking for themselves....

Oh let's see shall we... Because it's not my property maybe? Oh and because it also forbids it in the tenancy agreement... Always one keyboard warrior!

You’ve raised the issue with the landlord, he’s sent round a gas safety engineer to look at the boiler who’s given it the ok. What do you want or expect to happen now? 

Could you please quote the exact wording from your tenancy agreement that forbids you from getting your own gas safety engineer in to look at the boiler?