Aircraft takeoff noises from boiler

[uBe_Astard]

I have a Sime Super 90 Plus boiler that is making these noises. Couple of months ago the noises were only sometimes when the boiler had started to give heat, then it would settle down. Now the noises are constant.
I did call a plumber out about 5 weeks ago before the noise was constant and he charged me £40 to tell me it was the 'ioniser' I think he said and I should just leave it. Now the constant noise is driving us mad. Has anyone any experience or suggestion of how to resolve this and the costs involved?
Thanks

 

[Breesey]

Is system pressure correct.
Pump maybe failing.

 

[gas4you]

What on earth is the 'ioniser' Never heard of this on a boiler

 

[Breesey]

Sounds good though doesn't it?

At least he gave the correct advise about the "ioniser" !! Just leave it.

 

[uBe_Astard]

The presure is fine. Actually, ioniser may not be the correct word but it was a word that sounds like it.

 

[uBe_Astard]

I have just been told it is the fan on the boiler. How difficult are these to replace?

 

[bengasman]

Fan replacement is CORGI job, especially if it sounds like ioniser.

 

[Agile]

The Sime 90 has a constant speed fan!

Does it make this noise ALL the time on heating and hot water or does it only do it when the flame comes back on again during a heating session?

Tony

 

[uBe_Astard]

The Sime 90 has a constant speed fan!

Does it make this noise ALL the time on heating and hot water or does it only do it when the flame comes back on again during a heating session?

Tony

It is when the flame is on during a heating session. Strange thing though, yesterday and today its been alright but it was there for days up till 2 days ago so i thought it was here to stay.
I'm puzzled...

 

[Agile]

Sounds like kettling as a result of a wrongly adjusted heating setting in the boiler.

Tony

 

[uBe_Astard]

Was the fan. Packed in today and someone came a replaced it for me this afternoon, £200.
Glad I argued and refused to pay the plonker who came to me a while back and told me it was the ***niser and to leave it alone, and he wanted me to pay £47 for the advice.

 

[Agile]

£47 would have been very cheap to diagnose the fault if he had been able to do so!

I am still surprised by the fan being the problem because the fan operates equally during hot water and heating and you seemed so convinced it was only during heating.

Tony