Ariston Microcombi

[clarkerothwell]

Any help would be great!

Turn Heating on and :

Fan starts, air pressure switchs operates, pump running, boiler ignition starts, gas valve opens, burner starts, runs for 10-15 secs-- KEEPS SPARKING ALL WAY THROUGH-- then locks out on red light.

When reset it repeats above, Also same on hot water.

HELP!!?

 

[kevplumb]

KEEPS SPARKING ALL WAY THROUGH-- then locks out on red light.

it's not detecting the flame

 

[clarkerothwell]

yeah i gathered that, but how can i prove that?
Got to be sure because its the favourite circuit board that would have to be changed!

 

[kevplumb]

could be the flame detection electrode or the lead

 

[clarkerothwell]

was the circuit board, common on these, nows theres one board that inter changes with all the past three.