Question from Andrew, via email:
My Baxi 105e fires up fully, then after two seconds, the flame reduces and dies completely. I’ve called a heating engineer out but he couldn’t help me. He checked all of the sensors and the gas pressure, which he said were ok. Have you got any ideas what else needs to be checked? The boiler is installed in Spain so no parts are available locally.
Response from the heateam technical office:
This problem can be down to a number of things, you need to get a heating engineer to check the electrical polarity, basically making sure there is no power on earth or neutral. Then the engineer should check the inlet gas pressure, making sure there is plenty of gas getting to the appliance. Once he’s checked this, he will then need to check the burning pressure at minimum. I would also have the engineer check the integrity of the flue to make sure there is no blockage, corrosion or leaking seals. If these things are ok, then I would suspect a problem with flame rectification, which could lead to there being a problem with the PCB or electrode and lead.