Does burner motor start?
YES
NO
START
Switch on electricity supply. Set all boiler
controls and external controls to call for heat.
Burner operating satisfactorily.
Press reset button. Check for pump
seizure. Faulty capacitor or faulty motor.
Check for correct fitting of photocell, or
change photocell. Check there is oil in tank,
all oil pipe valves are open, oil pipe and
pump are purged of air. Check oil pump drive
and oil pump. Check oil pump solenoid
opens. Check wiring to solenoid coil. Check
for kinks in flexible oil pipe. Check nozzle
for blockage. Check fire valve.
Check pump solenoid is operating correctly.
Check correct nozzle is fitted. Check pump
pressure and air shutter setting. Check
correct fuel is used. Check flue for blockage
or inadequate draught.
Is flame stable?
Is flame established?
Is burner lockout lamp lit?
12.3 Burner
YES
NO
NO
YES
YES
NO
YES
NO
Is oil delivered to combustion chamber?
Clean reset or change electrodes, check
ignition transformer and leads, check nozzle
for damage or carbon build up.
Check motor wiring fuse, boiler control and
limit thermostat. Check power supply.
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