I have a 'Ferroli combi 77.FF boiler 75446'
It continually makes a noise from the moment I switch it on, making a noise like a groaning/whining sound...the system radiators also seem to overheat and cannot be ajusted by the thermostat control unit. If I turn the control to far the heating turns compleatly off.

mike, February 2008

your fan is the most likely cause of the noise the problem with your radiators will be the thermister on the heating being faulty i would recommend chahging both thermisters the only other cause would be if you had a room thermostat this could be faulty

ricky, February 2008