Boiler lockout light glowing. When reset button is pressed , the boiler starts the ignition sequence, but fails at the spark, So what is the faulty part? Ignition electrodes, pcb, gas valve, gas supply, fan, air pressure switch, pump, system pressure switch( APS), NTC sensor, or overheat stat, or circulation problem?. Okey the electrodes are sparking, you can see that through the combustion chamber glass, so thats out, I checked the gas supply..its fine.. , Checked the fan, pump, APS, system presure switch, NTC, And the overheat stat..they all okey. Whats left then?
