Thanks Oilman and BDL for replying.
BDL, in answer to your questions,
I have a Potterton Kingfisher boiler on an open vented system
As far as I am aware the pump is working fine
All radiators have been bled but when the heating is on the three cold rads suck air in so consequently I...
Hi,
Have moved into a new house before Xmas and heating switched off for two weeks prior. Since moving in three radiators upstairs (perveived to be last on circuit) will not heat. Have flushed all rads, drained and refilled system. Still no heat. Have bled all rads too. Finally yesterday...