The national newspapers and radio have been reporting on a problem concerning AGA type cookers. For years it has been implied that the shorter service intervals may be a regional or even national problem, but could the “problem” have a very simple solution?The by-product of carbon is produced when kerosene vaporises from its liquid form into a gaseous state causing it to “crack”. This process begins from the moment the burner is ignited. Over time a black carbon deposit can build up, the older designs of cooker are more prone than the modern equivalents.Due to high call out charges, there have been a number of websites explaining DIY fixes to your cooker. Despite many reports and rumours about the cause of this particular problem, there can only ever be one or two problems that will actually affect the combustion process.Firstly, check the condition of your flue (the duct for smoke and waste gases). You may have recently had your flue cowl replaced with that of a different design, there may be a restriction blocking the chimney such as tree branches or the erection of a new building. If the area around the flue has been changed in any way, it could seriously affect the wind conditions of your cooker, which in turn will affect the combustion and the temperature around the burner and carbon leg. If the fuel vaporises in the carbon leg, carbon will “crack” and form here instead of the correct area (the vaporising chamber of the burner) and will only need a piece of carbon the size of an apple seed to cause a blockage whereas a teaspoon full formed in the correct place would not have any affect. A taller chimney is advantageous over a shorter one as the higher the flue pull, the cooler the carbon leg is kept, meaning it is less likely to create a gathering of carbon in the wrong place. The downside to having a higher chimney is that you are likely to use more fuel to maintain oven temperatures.The second element to check is the more commonly blamed problem; fuel quality. Since the early 80’s there has been a problem with premature carboning with vaporising burners. Although the oil companies have regularly been blamed for providing “dirty oil” to customers, this isn’t the case. Nearly every year the EU directives on sulphur reduction become tighter, helping to lower the amount of environmental pollution.It is important to note that the AGA brand of cooker http://www.agaliving.com/ is handmade and performance will therefore naturally have a slight fluctuation from model to model. Environment, installation and maintenance will all affect the model’s delivery of heating and cooking times.Northern Energy is an independent family run home heating oil supplier and has to abide by the same rules and regulations of the big nationals, providing its customers with a very high quality product meeting the EU directives and standards.