Big build up in pressure and noise from boiler??

[Leekivel]

When ever i turn heating on after about 30 seconds the pressure doubles and there are really loud noises coming from the boiler where the water heats up. the boiler in question is a glowworm swiftflow. any ideas what the problem could be? thanks for taking time to read my problems =P

 

[Leekivel]

forgot to mention we had a burst pipe but that was repaired and the system was bled for air yesterday and heating worked fine all day, until tried to turn it on this morning.

 

[Leekivel]

Can anyone help? any advice is greatly received. thank you.

 

[xr4x4]

does the heating actually work, ie get hot.

sounds like you have a airlock , maybe in the pump, the air may have settled overnight.

does the boiler make boiling, thumping and hissing noises?

try bleeding the pump with the system off, you should get air coming out then some water.

im guessing its a sealed system, so the pressure should be around 1-1.5bar, cold idle.

pressure jumps could also be a fault with the expansion vessle.

 

[Agile]

It sounds to me as if the expansion vessel is failed or depressurised.

What kind of person repaired a burst pipe without checking it fired and warmed the system without seeing that fault?

If he is competent call him back but you might be able to sort it out yourself with help of the FAQ on this site.

Tony