boiler make funny noises and bangs and cuts out

[BARNEYLOTTIE]

please can you help i have blead the rads there fine ,the boiler make funny noise and bangs when timer cuts out

 

[ChrisR]

Lack of water (made worse by bleeding the rads) or lack of circulation.

Check the pressure or header tank, and that the pump's working.

 

[BARNEYLOTTIE]

Lack of water (made worse by bleeding the rads) or lack of circulation.

Check the pressure or header tank, and that the pump's workin
have fitted a new pump and there is water in the tank ,how do i check the pressure