Boiler Noise.

[derekpara]

I have a 1 year old Vaillant ecoTEC plus open vent condensing boiler which I am very pleased with.

However, in the last month I've become aware of a noise when the boiler starts. It sounds like a deep groan lasting about three seconds. I don't think it is pipe vibration of any sort but can't be certain.

Any expert ideas, please ? The boiler was very expertly fitted.

Cheers.

D

[BRIGHT SPARK]

dekka......A distant diagnosis tells me its the fan.

[derekpara]

Thanks, BS.

[EDDIE51]

Sounds just like mine, it is the pump starting up.

[gness]

Mine too, Eddie....four years old and been doing this for about three years.....like an old chap getting out of a chair....but no problems with the boiler......☺

[Hymie]

The fan will be energised whenever there is any heat demand from the boiler – but the pump will only operate when there is a demand for central heating (providing that the boiler supplies Direct Hot Water and not via a storage tank).

Knowing this, you can determine whether it is likely to be the pump or the fan that is responsible for the noise.

[derekpara]

Hymie, the system has a storage tank and the central heating is not set to come on at this time.

[derekpara]

So what's the concensus, folks. Fan or pump ?

Thanks again.

D