Worcester Heatslave. No lockout, no spark.

[Sheepish_too]

It's a 15/19. Stopped heating. The fan kicks in on the boiler, but there is no spark, at least nothing I can see through the hole if I pull the photocell. I would expect it to be locking out, but it doesn't. I'll have a look at the wiring diagram, but does the lack of lockout suggest the Satronic control box is getting things wrong?

 

[Burnerman]

If you pull the photocell from its socket, keep it in absolute darkness while you try to start up......if it does start, show the photocell a bright light immediately.
Maybe a better test is to pull the burner from the boiler, disconnect the solenoid coil from the oil pump and you should see a spark across the electrodes.
John

 

[Sheepish_too]

I'll reply to my own question. Yes it is the control box. The lockout button has been slightly melted by whatever has burned out inside it.

 

[Burnerman]

832.3, is it? A good bit of kit, I find.
John