Thanks to Corgiman and Shaggy for help re de-scaling system. (Sat 18th Sept post) Spent all day this Sat draining and flushing system - adding Fernox (limbo-ing under the rafters in loft!), bleeding radiators, and now I have hot water and heating!! Next Sat I'll flush and refill 3 times and look forward to a cosy winter. Think I might also have had a big airlock which I got rid of by all that draining, refilling and bleeding rads. Thanks again - great site for all my DIY.
