Bought a house recently and have done a whole home renovation but left the main heating system mainly untouched (due to budget). House is a three bed semi D
I added one rad onto the existing system. Upstairs has four rads. One in each bedroom and the bathroom. Downstairs has a rad in the hall, a rad in the living room and rad in the kitchen/dinner ( this is the new rad as there was previously gas fires in here). I removed all rads and fitted TRVs on them. I also installed two motorized valves at the boiler.
When I turn on the cylinder circuit the water gets up to the cylinder and the return pipe at the boiler gets warm quite quick ( 5minutes). When I turn on the radiator circuit some of the rads are getting luke warm others not at all. The inlet pipe to the rads is hot but the outlet either cold or luke warm. I have bled all the rads numerous times but no joy. Any ideas. The pump is a myson and probably there since the original install 20+ years. Boiler is a worchester condensing boilerThinking the pump may be struggling and on it's way out. Any ideas?