Baxi duotec 24 lpg fault E130

[Gasman dan]

hi all I have an intermittent fault with a Baxi duotec 24kw combi, fault code E130 (flue NTC sensor) I have replace this sensor after doing an resistance check on it (it checked out fine but changed it anyway) and also doing an resistance check on the ch NTC sensor (this too was fine)
I’ve just fitted a ch filter to the boiler an added a cleaner in case the heat exchanger was blocked (although boiler runs quite and no excessive temp on the gauge) I’m now thinking faulty pcb, but it had one of these last year, any thoughts would be appreciated.
Thanks

 

[jtsplumbing]

Did you replace the leads ?

 

[Gasman dan]

Hi, no which leads the ones going to the flue NTC sensor ?

 

[jtsplumbing]

Yes ! have had past problems with Leads, and a cheep part to try first.