how to fix my ariston boiler ?
when the boiler is asking for hot water , it comes out look warm , and when the tap is turned off the heating comes on untill the radiators are red hot and turns off , sometimes the boiler will produce red hot water and work properly ,,,,,,, the dirverter valve has been replaced and it has been flushed out , and there is a filter on the return to the boiler , what else could this be please
ariston boiler a/23 mmfi
mark, September 2011
