I had to drain off the system today so that I could change a radiator valve (downstairs) as it was leaking. When I refilled the system up, the hot water is back on in the taps, and the radiators upstairs are hot, but none of the radiators downstairs are hot. the central heating system pump seems to be working as it is hot and i can feel and hear water passing through it. what could be wrong and what do i need to do to get them to work?
I have bled each of the radiators until all the hissing went away and water came out.
I have a Grundfos central heating pump. 15-50 if that means anything. I dont know much about pumps, but looking at it there is a screw infront of it, probably the size of a one penny piece. If i have bled all the radiators, can I belled this pump too? If so how? I have heard that you can give the pump a sharp knock to try and dislodge any thing, if this safe and if so how do i do this?
I have bled each of the radiators until all the hissing went away and water came out.
I have a Grundfos central heating pump. 15-50 if that means anything. I dont know much about pumps, but looking at it there is a screw infront of it, probably the size of a one penny piece. If i have bled all the radiators, can I belled this pump too? If so how? I have heard that you can give the pump a sharp knock to try and dislodge any thing, if this safe and if so how do i do this?