Just replaced the leaky heat exchanger in my Potterton Suprima 100. It took approx 4 weeks what with HRPC ordering the wrong parts repeatedly but we managed it OK in the end.
Boiler sparked up fine for about a week but has now adopted the following mode of operation. viz: Power on, boiler stat set to maximum and tank calling for heat: fan starts running followed by ignition sparks followed by no gas and blinking red LED.
Am I right in thinking that this is the infamous 'lockout problem'? I can't remember if these are symptoms that, about 2 years ago, prompted me to re-solder every joint on the PCB. This cured the fault that I was experiencing at that time.
I can't believe that this failure is coincidental with replacing the heat exchanger but the only disturbance suffered by the PCB was the tilting of it's carrier to give access to the heat ex mounting bolts.
TIA
Richard