Expansion tank is in loft above hot water tank same room as loft rad "Never touched it but cleaned it out. rads were black water however system was flushed and all new rads installed including cylinder/ pump installed. Last night i turned boiler on full and sat up loft room with bleeed vaulve...
I have recently installed a new potteton supreme 50. a boiler engineer checked it and bled all system. i've got three rads downstairs and two upstairs and 1 in loft room. Every week loft rad gets cold i switch off and open bleed valve on loft rad "nothing happens" if I turn system on and open...