I have a Bax Barcelona 100 HE boiler. The boiler has been locking up upon startup (to red light) more and more frequently recently.
It is an intermittent problem. I would appreciate some guidance on troubleshooting whether to order electrode kit and/or ignition
I hear relay clicks followed by retries and red light. When it is working I think I hear an additional click (is that spark generator?) Usually, if the boiler fails on the first attempt, none of the attempts work. Occasionally, I have witnessed the boiler fire up on the 3rd/4th attempt.
My thoughts and plan:
- Replace the electrodes (they look a bit corroded and are pretty cheap). Is there a way to test these? No difference from a wire wool clean. The engineer tried to get a spark from electrode to insulated screwdriver he was holding - should that work anyway?
- replace air box and combustion seals as they are starting to disintegrate
- Ignition pcb - could this be at fault, even though the boiler does still work sometimes? Presumably hard to be sure it needs to be replaced in advance of trying a new one
- Spark generator - could this be at fault, even though the boiler does still work sometimes?
- The condensate drain was half full but did not seem blocked. I haven't tried removing the white lead to rule it out but I would have thought that the boiler would light, then shut down if there was a problem with that?
Thanks for any help and guidance
Andrew