Pcb keeps cutting out

[NEILC25]

Hi, I've got a ferroli 901 boiler, I initially thought the pcb was at fault so bought a new one and I'm having the same problem ( has been connected correctly), I switch the boiler on, all correct leds light up, pump starts, fan starts, pilot fires up, then it shuts down, all lights go off, however pump stays running, doesn't seem to be anything else running, fan stops, fuse doesn't blow, I then turned it off at the main switch, gave it five minutes, turned it back on and it does the same, replaced board because ignition wasn't clicking, ignition still isn't clicking, that's the only issue I can see, if the ignition is part of the checks on start up then surely it would just show a error light, any help would be appreciated, Thanks.

 

[cjg]

have you checked the relays on the board

 

[NEILC25]

I dont know how to check the relays , the previous board relays were buzzing , this isnt the case with new board , its just seems to show the led lights , they are on , however appear quite dim compared to previous , its seems like board just dies after a very short time , pump runs , fan comes on and then lights just fade , fan stops , however pump does remain on .