Keston C40?

What does e25 mean on the boiler? I kept resetting the boiler and it kep tripping can't understand as the boiler is only three years old.

Mrs barlow
July 2015

Fan on a C40 has an on-board tachometer to inform the Pcb of the actual fan speed, these fans have had problems of this nature, and the boiler should show either a "0", (standby) display or a Flashing Fault code.
Fan is more likely to be fault rather than Control Board

www.elanar.co.uk
August 2009

sounds like the fan isn't running at the correct speed to allow ignition sequence to start. i think the fan gives it own speed reading back to the pcb via an internal hall effect sensor, so i would suspect a faulty fan.

Ian
August 2009