rumbling boiler

[pseudophreak]

Hey guys, i thought I'd try you guys as i am having no luck with the engineer fixing it.

After my heating has been on for a while, it more often than not, starts make a loud rumbling noise (almost like the sound of a car idling.)
Turning the temperature setting up on the boiler up stops the noise but then usually the noise comes back after a while again. Running the hot water tap also temporarily stops the noise.

Running the hot water tap without the heating on can also cause the noise too happen after a few minutes.

Pressure is at around 1.2 and have bled the radiators.
Have had engineers out to look at it but, just my luck, the noise has never happened whilst they are there so are unable to diagnose it.

Any thoughts?
Cheers
P

 

[hammers4spanner]

possible kettling maybe

 

[petercj]

You could record the noise, maybe with a phone or some other recording device, and get your plumber to listen to it. If you can create an audio file, and upload it to the net, you should be able to post a link on this site. Check it out with google for further details.

Or try running some descaler through the system, followed by flushing with water.

 

[petercj]

Have a read here:-

Reducing Boiler Noise

Fernox F2 boiler noise silencer 500 ml

 

[diamondgas]

pseudophreak, Strange nick , :welcome: to this forum bye-the-way

Now then a car idling sounds to me more mechanical than heat related, I've heard pumps make a strange knocking noise when they're an there way out? I could be wrong mind you but there you go!!!

It'd be nice to know what appliance we're talking about here if you don't mind Noise is usually mechanical or heat related IMHO. When the noise begins turn your thermostat to minimum, see if it goes away! That'd most likely make it heat related

 

[kimbo]

p

Now then a car idling sounds to me more mechanical than heat related, I've heard pumps make a strange knocking noise when they're an there way out? I could be wrong mind you but there you go!!!

I agree with diamondgas I,d go for the pump

 

[pseudophreak]

Thanks for your replies guys.
The Boiler is a Riva Advance SE. i have uploaded a video: Boiler noise - YouTube
Video kicks off with the load noise straight away, then i turn the dial up for the temperature and the noise stops and then you can hear the normal boiler again.

i tried showing it to the engineer that came but he had no idea.

found this when doing a google search and sounds like the same problem: loud noise from BIASI riva advance HE - MoneySavingExpert.com Forums