Potterton Netaheat 10-16 electronic

[Last Plumber]

Pilot lights and has flame, fan runs but burner does not ignite.

But whilst pilot is alight is continues to try sparkings but if you tap boiler near pcb/air switch as a they are mounted behind each other hear a click which presume is air switch making and burner lights and boiler operates fine till demand is lost then burner won't relight when demand is called for again.

If the spark carries on after the pilot is lit, then there is a problem with flame recognition. If tapping the board causes the main burner to light, then I personally would suspect a dry joint or loose joint, even a faulty PCB component. I presume you've checked the obvious things like the connection of the HT to the board and the condition of the electrode, Polarity, earthing etc?

 

[Vee]

It could also be a faulty air pressure switch or blocked venturi. To check it would need the micro switch bridged with a piece of wire.

 

[plumb_know]

Hi Everyone,

Thanks for all the help, went back this morning and was PCB put new one in and all working fine now. checked seals not leaking on boiler also.

appreciate all the help