baxi 105he flame failure

[m2artj]

hello, can anyone suggest why this boiler (baxi 105he) cuts out after 10 seconds on c/h or dhw,but runs fine when the white lead`s disconected off condensate trap. the trap is clean and pipework is clear.fault charts pointing to electrode or pcb.

 

[lame plumber]

please have a look at the header on top of page, re an answer not until you prove your gsr Im afraid