I have drained water from radiator prior to moving it But am unable to find where to add water to replace it. Two thirds of the radiator is hot but not the top third. The Make is Vaillant Combi-Compact VCW GB 248 Combined heater CAT Type B

cheryl Oxley, April 2008

Presumably the boiler pressure is now low.....add water via the filling loop, usually a flexible steel braided pipe with a tap on it somewhere. Add water until the pressure reads 1 bar. Then bleed the radiator as mentioned below, but remember if you bleed air out, you need to put water back in until the pressure stabilises and the rad. gets hot.

John, April 2008

u have to get a key and air it ,its on the side of your radiator ,turn it untill water comes out

davy, April 2008