Ferroli Medenano pressure after bleeding rad

[tod4]

I'm at a friends and she told me her bathroom rad didn't get hot. All the others in the house do. Her HW was fine as well.
I bled the air out of the rad. and now there is no pressure on the bolier gauge and it won't stay alight. So no HW or CH.
She said that as I bled the rad upstairs there was a lot of noise in the kitchen where the boiler is.
What have I done and can it be put right easily?

 

[ChrisR]

Needs filling - see FAQs

 

[tod4]

Thanks, problem solved.