If an oil boiler will not start, a heating engineer can check the following. Please note, it is important to always isolate the electricity supply to the boiler before working on the boiler.
1. No fuel supply
- Ensure that an adequate supply of fuel is available and that the fuel
supply valve is open.
- Check the condition of the fuel filter and clean if necessary.
- Ensure the fuel supply is reaching the burner and vent pump.
- Check that the fire valve has not operated to shut off the oil supply.
2. No electricity supply
- Ensure electricity supply to the boiler is switched on and that all controls
are calling for heat.
- Ensure that the overheat thermostat has not tripped and reset if necessary.
- Check that a mains supply is present at the burner terminal block.
- If not, check the boiler and overheat thermostat.
3. Burner not starting (fuel and electricity supplies present)
- Press the reset button on the burner control box if it is lit.
- Refer to burner fault finding charts provided in the Manual and follow the steps provided.
4. Burner lights but goes to lock-out
- If the flame is unstable, check the combustion settings.
- Refer to burner fault finding charts provided in the Manual and follow the steps provided.
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