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.
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