Can anyone help please? We have an oil fired camry quartet boiler which was serviced 2 years ago and a new fan and fuel pump fitted. In the past week the boiler fires but the radiators are not warming up for at least an hour. I have checked the pump by undoing the screw on the front which shows it working as I thought there may be an air lock. You can probably tell I am not an expert in these matters, someone said it may be the flow regulator? - Any advice would be gratefully recieved.Thanks.
