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I used to have a sealed combi boiler, when i removed the radiator i wanted to replace i just turned the TRV to * and closed the 'from' valve. You should then be able to pressure the system as normal and then bleed the other radiators as normal. On sealed systems, I was told that you should...

Thanks alot - bleeding the vent by the pump did the trick - as soon as i did that I could hear water rushing into the pump and the pump load up - it must have been pumping nothing but air. Been round and bled all the rads again - will let system work for a bit then go round and do some more...

Good day to you. Glad I have found these fourms - I have done alot of searching and found alot of information that I otherwise would not have done and I thank you for that. However, to my problem - One morning I work up to the noise of water filling the header tank in the loft - which could...