Noisy boiler

[Hoofy]

My CH pump packed in (cold rads) so I had the plumber sort that out. As part of the job, he drained the system, stopping the little water tank in the loft from filling up, then reset the little water tank.

The boiler now kettles. It was quiet before. Also, there was more whooshing around the CH system (you could hear the whooshing in the rads) but now it's really quiet when the CH is on.

Sound aside, everything is fine.

Any thoughts? Has something shifted in the system causing the kettling? Is it possible that there's less water in the system?

[Dogwatch]

Turn the pump speed down a notch.

[counterofbeans]

Dogwatch said:

Turn the pump speed down a notch.

Up a notch?

[Hoofy]

How do you turn the pump speed down?

And would the speed be responsible for the kettling?

[Hoofy]

Sorry, I remember now, it wasn't the pump. It was a leaky double check valve that was replaced.

Anyway, the kettling boiler suddenly happened after the valve was replaced. Any thoughts as to why? And how to deal with the kettling noise?

[motco]

Put Fernox MB1 in it

[Hoofy]

Thanks. Out of interest, would the work done make the boiler suddenly start kettling? It was never like this before.

[Z4monster]

Mine started kettling a while ago. Check all air is out of the system by bleeding the radiators. I tried the Fernox stuff but didn't make any difference. Got the pump replaced under CH cover and then the Main Circuit Board. This cured it. Looks like the MCB was faulty and not triggering the pump correctly and that caused the kettling problem.

[motco]

Hoofy said:

Thanks. Out of interest, would the work done make the boiler suddenly start kettling? It was never like this before.

Could it be that the 'old' water had had the air driven off, but the fresh water was still gaseous, as it were?

[Hoofy]

Thanks, will bleed that radiators as a first go.

I did read somewhere that the pump could be an issue but it did all suddenly occur after I had the valve replaced.

[Hoofy]

motco said:

Could it be that the 'old' water had had the air driven off, but the fresh water was still gaseous, as it were?

The more I think about it, the more I wonder if this is the issue. Is this science or broscience? What you say seems to make sense to me. And if this is the case, what sort of settings to I want to get the air out of the system? High setting on the thermostat, low setting on the boiler to get the pump working more?

[motco]

Hoofy said:

motco said:

Could it be that the 'old' water had had the air driven off, but the fresh water was still gaseous, as it were?

The more I think about it, the more I wonder if this is the issue. Is this science or broscience? What you say seems to make sense to me. And if this is the case, what sort of settings to I want to get the air out of the system? High setting on the thermostat, low setting on the boiler to get the pump working more?

Time and/or Fernox

[Hoofy]

motco said:

Hoofy said:

motco said:

Could it be that the 'old' water had had the air driven off, but the fresh water was still gaseous, as it were?

The more I think about it, the more I wonder if this is the issue. Is this science or broscience? What you say seems to make sense to me. And if this is the case, what sort of settings to I want to get the air out of the system? High setting on the thermostat, low setting on the boiler to get the pump working more?

Time and/or Fernox

Right. Well, I'll go with waiting as it's cheaper.

[Mr Roper]

Forgive the hijack...


Having similar with a property i've just bought.
Each time i've bled the radiators no air is present yet the pipes are still noisy. The boiler is 10 years old and works fine.
The property is a victorian town house.

The noise reminds me of my old car resting after a very spirited drive. Ping, ting etc.

It's beginning to drive me insane.

Before I call the plumber is there anything obvious i should be checking? Access to the loft is quite tricky... (Directly above the stairs + high ceilings)...but possible with a decent ladder.

Tia.


eta

Edited by Mr Roper on Wednesday 15th November 11:15

[Mr Roper]

...anything at all?

[Bikesalot]

Following - mine works fine but makes a kettling noise, more evident now it's on more through the colder months.

[Peanut Gallery]

Mr Roper said:

The noise reminds me of my old car resting after a very spirited drive. Ping, ting etc.

Sounds like a pipe that is expanding is rubbing against something as it pushes past and contracts past. - look for any runs to / from a rad where the pipe is resting against something and either clamp it or give it an air gap to move without making a noise.

[Mr Roper]

Peanut Gallery said:

Sounds like a pipe that is expanding is rubbing against something as it pushes past and contracts past. - look for any runs to / from a rad where the pipe is resting against something and either clamp it or give it an air gap to move without making a noise.

Thanks....I'll have a prod about later.

The noise can be heard throughout the house so I'll be very happy if this works.