An oil-fired AGA is designed to run steadily, maintaining a constant temperature with minimal attention. If yours keeps going out, it usually points to an underlying issue that needs to be checked.
These are the most common causes and what to look for before calling an engineer.
1. Missed or Incomplete Servicing
An oil AGA should be serviced every 6 to 12 months. During a service, the burner is cleaned, the flue is checked and carbon deposits are removed.
If servicing is skipped or carried out incorrectly, carbon can build up and restrict the oil flow to the burner. You may notice the cooker losing temperature or giving off a stronger oil smell before it eventually goes out completely.
Regular maintenance helps prevent this and keeps the cooker running more efficiently.
2. Using the Wrong Type of Oil
All oil-fired AGAs require 28-second commercial kerosene, sometimes called Class 2 Kerosene to BS 2869.
Using a different grade or contaminated oil can cause poor combustion and irregular burning, leading to the flame going out.
If the fuel has been stored for a long time, water or dirt may also have entered the tank. Ask your supplier to confirm the specification, and if in doubt, have the oil and filters checked.
3. Fuel Supply Problems
If the cooker has recently stopped working, start by checking the oil level in the tank. If the supply has run too low, air can enter the line, stopping the flow completely.
You should also inspect the filter on the feed line and any visible pipework. Blockages or faulty valves are common causes of interruption.
If the cooker goes out repeatedly after refilling the tank, the system may need to be bled by an engineer to remove trapped air.
4. Faulty Valves or Burner Components
Over time, components such as control valves, thermostats and wicks can wear out. A faulty valve might allow too little or too much oil through, preventing stable combustion.
These parts should only be replaced by a qualified AGA engineer to ensure safe operation.
5. Environmental Factors
Changes in temperature or air pressure can affect combustion, particularly in older installations. A blocked or restricted flue can also prevent gases from escaping properly, causing the burner to extinguish.
Make sure the flue outlet is clear and that ventilation in the room is adequate.
When to Call an Engineer
If basic checks do not resolve the problem, turn off the oil supply at the tank and contact a qualified AGA engineer.
Never try to relight a hot burner, as this can cause oil to vaporise and ignite suddenly.
Our engineers can inspect the fuel system, clean or replace components and get your cooker running safely again.
To book an oil AGA service or diagnostic visit, contact Smart Range. We cover Surrey, Kent, Sussex and London.
