alpha cbx combi boiler fault

[manortim]

got a alpha cbx combi, both the neons are flashing (one then other) book says its pressure. pressure is fine on gauge. checking the electrics, it tells me the pcb is faulty.

any thoughts?

thankyou.

(p.s, i am corgi, just doing some weekend work on breakdowns.)

 

[Paul Barker]

sludge in pressure sensor? Have you proved it?

not had to change a cbx pcb to date.

Diagnosing from flow charts in the comic's is great for a laugh as it always defaults to change pcb.

 

[manortim]

sludge in pressure sensor? Have you proved it?

not had to change a cbx pcb to date.

Diagnosing from flow charts in the comic's is great for a laugh as it always defaults to change pcb.

cheers, you were quite correct, i bridged the terminals, unit worked. so i cleaned old sensor, it worked but failed twice in the 30 mins i was on site. so replaced and its sorted now.

cheers, Tim