how to re fill potterton kingfisher 2 boiler system ?

? is it a pressurised system or do you have a small header tank in the loft.

if its pressurised then you need to find the filling loop usually near the expansion vessel (red tank).

if its a header tank and you havnt turned the water off then you have a problem cos its either an air lock or blocked fill and expansion pipe.

Brian Emian Plumbing & Heating Norfolk
April 2011