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Hi, I've just had to install a new radiator (new position) so had to drain the system. This time I kept the flow & return valves open when I drained he system. Now after I filled the system back up and got the pressure back up the boiler won't fire up. (Worcester HiFlow 400 sealed system). Any...

I'm just cleaning my CH system (sealed) and have used Fernox Restorer. Before I put in the protector they advise I flush the system twice. I now need to flush the system with clean water and was wandering how to get the pump to switch on with cold just water? Or any other suggestions? Thanks

Hi all, sorry if this has been answered before but I tried to look back but couldn't find any posts. Anyway I am a competant DIY'r & can manage general plumbing jobs myself. I have a sealed CH system - Worcester Highflow 400 RSF, Basically I need to change a radiator in the downstairs...