What's wrong with my Profile 50e boiler?

hi,
hard to say without more info, but sounds like either an airlock, or lack of pressure in the radiator water system.
if you have a filling loop tap and guage then you need to top up the pressure on the guage to about 1.5.
if you have a loft tank then it is possible the ballvalve has stuck and needs to be freed.
if these things are too hard foryou to work out then unfortunately you need a heating engineer...unlikely to be the boiler at fault

graham
January 2006