Unable to repressurise combi system.

[Toddy2]

System lost pressure, tried to refill using filling loop, no success, turned all trv's off and turned taps off on flow and return to eliminate boiler and still no joy. Can hear water flowing into system and air either entering or expelling through open bleed screw on hallway radiator - the one which is not allowed a trv, but it never emits water. I've looked at various points under the floorboards but cannot see a leak, I live in a bungalow.........what next?

 

[Deleted member 120897]

Check the pressure relief valve isn’t stuck open, and have you given it time to fill?