Vokera compact 28

[Curnsie28]

I have a problem with a Vokera compact 28. After tests and talking to vokera I changed the PCB and the boiler worked straight away. Customer has phoned and said the boiler has stopped again. Fan runs, pressure switch activates and boiler lights and goes off again to red light on display. I thought thermistors weren't reading right and changed them originally but to no avail then changed PCB an all fine till now! Anyone any advise?

 

[bgdon]

Check the spark/rec lead is on the transformer properly, or ignition pcb if its not rectifying

 

[DalesPlumbing]

Venturi need cleaning?

 

[julesverne]

did you chamge the pcb or the ignition board because in my experience generally it is the ignition board at fault not the pcb when this happens.