I have a worcester greenstar heatslave 18/25 oil boiler. Its aprox 4 years old and is driving me and my engineer nuts. All sugestions welcome. It locks out when the heating is off, it will restart once I reset the lockout button. Sometimes on the 1st reset but usually on the second. Its had regular servicing, a new controll box, a new oil nozzle, it has fuel at all the right mixes, tried installing a tiger loop and still it continues to lockout. I can only use the manual controls as it usually has locked out when cold. HELP !

karen, January 2011

my boiler the oil has no pressure but i cant get it to engage, you can hear it spark and i know i have a good supply of oil

karlwillis, November 2012

hi,
our wb 18/25 boiler is doing the same thing.
did you manage to fix yours ?
if yes,what did you do to fix it.
thanks

d p lloyd, October 2011

It could be a number of things, really need to listen to it as it goes through it's firing sequence.
Can you hear it sparking, if not could be the transformer. Could be a split electrode lead shorting.
Have you tested the solenoid?
Is the oil pressure and air setting correct.
Does the motor buzz when it's started, could be the capacitor or the motor.
Have you tried a second control box? Just because tghe new one is straight out of the box doen't mean that its 100%

SDG26100, January 2011