Noisy boiler

JM · 22 Oct 2003

A couple of days ago my boiler started making unusual noises. A few seconds after it fires up it makes a noise like a jet plane taking off. This lasts for 5 or 6 seconds and then it operates normally until next time it fires up. The boiler is a Myson Apollo.

Can anyone shed any light on this problem?

oilman · 22 Oct 2003

Try doing a search for "noisy boiler", there's plenty of earlier enquiries for similar things.

JM · 23 Oct 2003

I searched through the forums before posting but didn't find a solution unfortunately.

spark · 24 Oct 2003

I am not a plumber or heating engineer but...

I have exactly the same boiler in my flat and had a problem that sounded remarakably like yours; it turned out to be the fan motor bearings knackered. Took an hour to do and didn't cost much so don't let those plumbers (or heating engineers as many of them prefer

) rip you off!

bob99 · 25 Jan 2004

spark said:
I am not a plumber or heating engineer but...

I have exactly the same boiler in my flat and had a problem that sounded remarakably like yours; it turned out to be the fan motor bearings knackered. Took an hour to do and didn't cost much so don't let those plumbers (or heating engineers as many of them prefer ) rip you off!

I Have the same boiler with the same problem. The merchants are quoting £139 for a new replacement fan unit.(although I have found a recon unit for £40 online) ..how did you repair it and did you manage to do it for less than this. Reply would be welcome

ollski · 25 Jan 2004

If you are disturbing your case seal on the boiler you are well into corgi territory.

ChrisR · 25 Jan 2004

Apollo's are particularly DANGEROUS. They have killed 40 people. Don't go in there unless you have the equipment and knowledge to test them.

oilman · 25 Jan 2004

If you are disturbing your case seal on the boiler you are well into corgi territory.

But you don't have to be registered to work on your own boiler. Are you saying the case seal has a direct connection with the gas supply, or does it influence the combustion conditions?

ollski · 25 Jan 2004

No that's true oilman but you do need to be able to prove competence still and having to ask how to do it would tend to imply the level of competence to do the task in hand is not sufficient.
The case seal on a room sealed boiler is the only thing preventing products of combustion from entering the room space so if mixed with another fault causing incomplete combustion you have a problem!
I'm not telling anybody what they should do just pointing out the risks

ollski · 25 Jan 2004

Ah here you go for a fuller explanation

bob99 · 26 Jan 2004

I understand the issue of case seal etc and am competant to ensure seal is OK when reassembled.... However my question relates to finding out if it is possible to recondition the fan unit itself without paying the extortionate OEM spare price ( the component cost of the motor and fan cage is about £15, so why £139)....answers or suggestions!

ChrisR · 27 Jan 2004

It can be done, but it isn't a diy job. How could you test it?

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Noisy boiler

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