The most common cause for a furnace pilot light to repeatedly go out is a broken thermocouple. The thermocouple controls the pilot light, so if it is damaged or needs cleaning, it can cause the pilot light to malfunction. Thermocouples are easy to replace yourself; they can be purchased at local hardware and home improvement stores.Know More
To replace the thermocouple, unscrew the internal connecting nut and copper lead that are located inside the gas line connection. A mounting bracket is located underneath the thermocouple tube. Unscrew that bracket nut, and replace the thermocouple.
In addition to a malfunctioning thermocouple, issues with the pilot light are also caused by obstructions, a low flow setting on the pilot light line or a dirty pilot light line. The gas flow to the pilot light can be easily adjusted to a higher setting. To clean a dirty or clogged pilot light line, all equipment must be completely disabled and cooled down. Once the system is cooled, remove the nuts, bolts and thermocouple tube. Take a wire brush, and gently scrape away the soot and dirt. Once the area is free of debris, replace the tube and tightly screw the nuts and bolts back into place. If troubleshooting does not work and the pilot light continues to malfunction, contact a professional for further assessment.Learn More
To clean a furnace, vacuum off the burners, and then get the debris off other important components, including the blower, flame sensor, surface igniters and pilot. Change the furnace filter to keep your furnace operating at its peak for another year.Full Answer >
The average furnace lasts 15 to 20 years. This life span is typical of a furnace with a stainless or aluminized steel heat exchanger. In contrast, old furnaces with heavy metal heat exchangers last for 30 to 40 years, but they are less efficient than newer models, prompting many homeowners to replace them even if they still work.Full Answer >
According to the American Iron and Steel Institute, the purpose of a blast furnace is to produce enough heat to extract iron from raw ore. Iron ore, coke and limestone are placed into a blast furnace and then heated until liquid iron can be separated from the ore.Full Answer >
The on-and-off cycling of your furnace depends on many factors, including proper system sizing, thermostat settings and weather conditions. Cycles that are too close together may indicate an oversized system.Full Answer >