Loads of air in central heating.

[Riley]

Yes, but there are two pipes coming out of the front of the cylinder that go to the tank in the loft. One is a feed and one is a expansion pipe(?) from the cylinder isn't it? Could it be sucking in air from the expansion pipe(?).

Thanks.

If it’s plumbed wrong then yes but if it’s worked fine up till now then Doubtful. The pipes out of the front of the cylinder are flow and return from the boiler

 

[Chris12345678]

It has worked fine until this week. I'm worried that a blockage somewhere will be causing it to suck in air from the expansion pipe(?).

I will have to check tomorrow night as the cylinder in also in the kids bedroom!

Thanks for your help 🙂

 

[Harvest Fields]

It has worked fine until this week. I'm worried that a blockage somewhere will be causing it to suck in air from the expansion pipe(?).

I will have to check tomorrow night as the cylinder in also in the kids bedroom!

Thanks for your help 🙂

The reason I asked about the pipe being hot and the water in the f & e being hot is sometimes they can pump over. This will definitely be sucking air in if it is.

 

[Mdljk]

5 minutes refilling the f&e tank every time you switch heating off. That is a lot of water going somewhere. Sounds to me like you have a leak in your heating pipework. If it was upstairs you’d see it coming through the downstairs ceiling so it may well be that a heating pipe hidden under the downstairs floor has sprung a leak in the cold weather?

 

[Harvest Fields]

5 minutes refilling the f&e tank every time you switch heating off. That is a lot of water going somewhere. Sounds to me like you have a leak in your heating pipework. If it was upstairs you’d see it coming through the downstairs ceiling so it may well be that a heating pipe hidden under the downstairs floor has sprung a leak in the cold weather?

Not a bad shout to be fair.

 

[Riley]

I did think that but I maybe misread that it was refilling from pumping over??

 

[Mdljk]

Worth trying to eliminate the more obvious first I’d say.

 

[Harvest Fields]

Worth trying to eliminate the more obvious first I’d say.

Looking in the loft would definitely be easier than lifting boards.😉

 

[Mdljk]

Any downstairs room currently started showing signs of condensation perhaps?

 

[SJB060685]

Is that pump in boiler mounted on return?

 

[Chris12345678]

After bleeding it earlier this evening, it was on for a few hours being very slow to get warm.
After turning it off it was refilling for at least 15 minutes until I turned the valve off.

No signs of condensation.
There’s still air moving around quite loudly 20 minutes after turning heating off.
All downstairs pipes are buried in the concrete floor.
Worrying.

 

[Mdljk]

If you look near the roofline outside you will see the ‘overflow’ pipe coming from the f&e tank for the ch. when the heating is on tomorrow look to see if any water is coming through that pipe. If it was ‘pumping over’ water coming out of that pipe could confirm it. If not and you are still losing water then that water has to be going somewhere else ie a (likely) leak in downstairs underfloir pipework.

 

[Mdljk]

After bleeding it earlier this evening, it was on for a few hours being very slow to get warm.
After turning it off it was refilling for at least 15 minutes until I turned the valve off.

No signs of condensation.
There’s still air moving around quite loudly 20 minutes after turning heating off.
All downstairs pipes are buried in the concrete floor.
Worrying.

With the amount of water you are losing I would expect a carpet to be wet if a pipe within the concrete floor had failed.

 

[Chris12345678]

Could it be a cracked boiler and the water is coming out the flue as steam?

 

[Mdljk]

Could it be a cracked boiler and the water is coming out the flue as steam?

Agree that is my thought if no downstairs leaks found.

 

[Chris12345678]

Preferable to an unfloor (buried in concrete) leak 🙂

 

[Mdljk]

Is there any sign of water under the boiler itself?

 

[Chris12345678]

Is there any sign of water under the boiler itself?

No.

 

[Mdljk]

Has anyone done any plumbing work anywhere in the house on anything?

 

[Mdljk]

..... around the time this first began