there is a black screw cap on the boiler side of where you put the key can you get to blockage by taking that cap off and poking through there?
It seems to be on the bend of the what I think is the fill valve!
I Think it could be the first suggestion as the pressure gauge is working but boiler sounds like its kettling due to lack of pressure. Any tips on how to unblock it please?
just replaced a radiator in my system.
When I came to re-pressurise the system on the boiler it wouldn't!
Water it coming through supply tap and filling key but not going into system. Help please! :?