Ok, its like 4 years later, but I too had this orange light flashing problem.
I tracked the fault down to the flowswitch. Inside there is a tiny microswitch which can go faulty. It cost about £6.
Hope that helps......
Cheers for the reply.
I do not have a room thermostat wired in.
Also I got the voltage wrong the board. Its 155vac either side to earth. The ignition transformer is reading a resistance of 0.002 ohm.
Hello, last night my sime packed in once again. This time a red light appears on the boiler which is referrred to as a 'lock out' fault by the manual.
When the boiler atempts to fire, I can here the gas valve pulsing and can hear the fan running. The only thing I am unsure about is the...