Boiler : Strange Roaring Sounds

[rideforever]

Got a one year old Glowworm Ultimate. Just had a radiator installed today with a drain down, now the boiler is making roaring sounds with the HW on. Sounds like it doesn't attenuate (is that the right word) and goes high flame then low flame cyclically and each time makes a new roar, then when the HW is shut off the machine powers down but there is a kettle boiling sound lingering after.
I am sure this wasn't happening before.
Any ideas?

Two recordings attached which start off then HW then off.

Cheers

 

[gasbusters]

If its 1 years old dont touch it, get the manufacturer out on a warranty call.

 

[picasso]

Most likely the boiler is full of air, there should be a air vent inside the boiler but you should not take the front off the boiler , what about getting the plumber back that done the drain down ?

 

[muggles]

As above, sounds like the air bleed program wasn't run after it was refilled

 

[rideforever]

Yeah it was air in the system not bled through, seemed to resolve on its own after a day's use