I wanted to put some cleaning solution in my radiators and the boiler had been banging and knocking on and off for some time now, i have bled all the water out of the system and have refilled the header tank, but now cannot get water back into the radiators, when i open the bleed valves there is nothing, no hissing or air movement and no water in any of the radiators. I have a grundfos pump installed, do i have to run the boiler to get the pump to allow water through? I really know nothing about this kind of thing but thought it would be simple enough to do. Help!!
Oh I forgot to say there was difficulty in emptying the header tank and it was syphoned out but later the "missing" water did bleed out of the radiators, or so we thought.
Oh I forgot to say there was difficulty in emptying the header tank and it was syphoned out but later the "missing" water did bleed out of the radiators, or so we thought.