Loads of air in central heating.

[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