SOS!! I have just power flushed my heating system, but all the radiators are still cold. I can't even hear the water flowing into the radiators. I tried bleeding all the rads all i get is the hissing sound and no water coming out.
I have just had a new circulation pump fitted before doing the power flushing and i can hear the pump running, and the boiler was also inspected and given a clean bill of health. The water level in the header tank is also not changing and i don't think the inhibitor that i have put in there has been circulated through-out the system which also seem to explain why i can't seem to completely fill the rads with water. ANY HELP will be greatly apreciated on this issue(s), the house is freezing cold.