About 4 weeks ago I posted a comment about unreliability of Baxi Barcelona (3 logic boards in 5 years) ... standard condensing boiler
After 2 weeks of running OK with latest board ... now have an intermittent problem ... at least every couple of days it fails.
Boiler stops working .... removing the front lower cover, shows the 'overheat/lockout' red LED is illuminated.
Turning the boiler 'off' with the thermostat on/off switch .... and then back on again, puts boiler through a reset and all works again for a few days.
All works OK ... plenty of output, and DHW and heating worked fine for several days, then it happened again.
In fault condition ... Main LED is ON, and not flashing. Lock out LED is on and not flashing From manual this states 'Ignition Lockout' has occurred.
It suggests: condensate trap is blocked Fan is not running No spark gas below pressure Faulty logic board.
Swapped out logic board again ... no difference.
As all works again when I reset ... anybody any ideas ? .... any of those could give a momentary glitch I guess, but how would I track down, other than expensive elimination swap outs.