Our recently installed Main Combi 30 He ECO boiler is displaying a 50 degree LED fault (Fault on fan or flue). The engineer has replaced the PCB, selector switch and gas igniter lead assembly. The boiler did run correctly on central heating / hot water mode for a half hour or so and then goes out on this fault. Can you let us know as to what may be at fault?

Tom, March 2014

''recently installed boiler''
in that case the boiler would be under a manufacturers warranty
the manufacturers engineers should be more than capable of rectifying the fault

Q, March 2014