Hi,
Turned on central heating and it does BANG, BANG after about 60 seconds - really loud - then boiler cuts out, showing overheat symbol. Pipe leaving boiler is red hot, and lots of steam out of vent pipe. I think there's air in the system. bled all the rads - still the same. Opended screw on the central heating pump - nothing comes out of the pump (air or water). Will try to bleed the pump agian tomorrow with central heating on, to see if pump is running/bleeds.
Any other ideas on what I should do?
Turned on central heating and it does BANG, BANG after about 60 seconds - really loud - then boiler cuts out, showing overheat symbol. Pipe leaving boiler is red hot, and lots of steam out of vent pipe. I think there's air in the system. bled all the rads - still the same. Opended screw on the central heating pump - nothing comes out of the pump (air or water). Will try to bleed the pump agian tomorrow with central heating on, to see if pump is running/bleeds.
Any other ideas on what I should do?