When my potterton profile 60e trys to fire up there are a lot of sparks from under the PCB. It used to start in the end but now wont fire. do I need a complete new PCB or are there other parts to try first (I have read other have replaced capacitors. Thanks
Seen this on numerous occasions. Thanks to poor design/manufacture, the pcb pads holding the high tension transformer (used for generating ignition pulse) start developing dry joints through repetitive vibration of PCB. Solution? Take PCB out, remove transformer, clean up PCB and apply health dollop of hot met glue before replcing and soldering. The hot melt glue both holds transformer down and helps isolate against future vibration. It's a common fault, job takes 40 minutes from start to finish and you'll have no more problems in the future.
Nick
June 2008
It sounds like you have a dry joint or 2, you could try re-soldering these joints if you are confident about doing it, remember to turn all power off to your boiler first though
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home heating systems.