Part drained the central heating to change a leaky radiator valve in an upstairs bedroom. Once changed i then released the ball valve in the expansion tank to fill the system back up but nothing happened, no water left the tank and tried bleeding the radiators upstairs to draw water through but no joy. Now i have no hot water from the taps and no water circulating in the heating system.
My thought is, if no water left the expansion tank to refill the heating there must be a big blockage in the down pipe. Would firing mains water down via a hose pipe down the outlet from the tank be feasable in shifting the blockage. And yes there is some black gunge in the system as well so will look to drain the whole system at some point but now the priority is clearing the blockage.
Any advice would be greatfully appreciated
Rob