Suprima50 pcb fitted. Now no ignition

[Cheese'n'Egg]

Hi All. I have just replaced the old pcb with new improved variety 5111603. It now goes through start up routine up to flashing orange/green, the fan starts, but no ignition occurs. After a minute or so the fan stops and the led goes to flashing red 3 times/sec, indicating an APS problem. I notice that from the instructions, no earth is required to the fan??. I also did not remove the fan. What do I need to do now?

 

[scatmanjohn]

did you replace the ap switch wires correctly?

 

[ollski]

Couple of times I presumed I had pushed the ignition lead onto the pin on the back of the board but had actually missed...worth checking.

 

[Baxi-Remeha]

can u hear the gas valve open, chances are you have knocked one of the pipes off the air pressure switch...

 

[PIPERPETE]

I would recon that you have got the pipes the wrond way around on the pressure switch

 

[Cheese'n'Egg]

Thanx chaps, will check these out on next visit to girlfriends boiler, not that my girlfriends a boiler of any sort, but ........ why am I nexplaining this to you.