HVAC systems can be extremely complex and require proper maintenance to ensure optimal efficiency and performance. Infrared wavelengths are longer than the wavelengths emitted by visible light, which is why we are unable to see them, but tools such as a thermal imaging camera can sense these invisible IR wavelengths and convert them to a digital thermal image that allows us to “see” them. Technically all forms of electromagnetic radiation are forms of light, and the visible light spectrum makes up only a small portion of the 7 different types. According to NASA, our eyes are only able to detect the wavelengths in the 380 to 700-nanometer range, known as the visible light spectrum. Infrared has a frequency from approximately 30 THz up to about 400 THz, IR light is invisible to human eyes, but we can feel it as heat if the intensity is sufficient” - What is Electromagnetic Radiation. “Infrared is in the range of the electromagnetic spectrum between microwaves and visible light. Identifying and correcting these problems early can lead to less costly emergency repairs, reduced/planned equipment downtime, and optimum unit performance. These tools allow technicians to quickly diagnose and monitor potential problems with the HVAC equipment itself, locate air leaks in the building envelope, water leaks, electrical problems, and more. Be sure to call us at 77 if you’re in the market for a new furnace.Thermal imaging cameras are a very powerful tool for use during HVAC inspections and services. Our top brands are engineered with the most advanced technology and offer optimal indoor comfort. HVAC Services and Products at Merrell & AssociatesĪt Merrell & Associates, we carry and install energy-efficient oil and gas furnaces with two-stage and variable-speed heating. Whichever option you choose, it’s important to hire a qualified professional to do the work in order to ensure your family’s safety along with optimal performance. Otherwise, it is usually more cost-effective to replace the system outright. Upgrading can be a good option if you can reasonably expect your home’s furnace to last for at least five to ten more years and it isn’t plagued by any other glaring issues. Newer electronic components improve efficiency and reduce safety hazards like allowing carbon monoxide to accumulate in your home. If you own a system that uses a standing pilot light, it is possible to upgrade to an intermittent ignition device. According to the EPA, the new Energy Star furnaces can save about $100 a year in energy costs. Today’s models have longer lifespans and are considerably more efficient than older models. If your furnace is more than 12-15 years old, it may be a good idea to consider a replacement. These include high energy bills, uneven heating, frequent on/off cycling, humidity problems, noise, excessive dust or soot, and the need for frequent repairs. There are often telltale signs to alert you that it may be time to replace your furnace. This will keep the flow of gas and ignite the burners. Once the pilot stays lit, turn the pilot valve to the on position.If the pilot is hard to reach, you may have to use a long fireplace match. Always turn the valve knob to the off position and make sure to wait at least several minutes for any residual gas to clear away.It’s a box-shaped device and is typically located near the gas burners. Make sure the thermostat is in heat mode.If you have an older model furnace with a standing pilot light, you can follow this basic procedure to relight the pilot flame. Once it has cooled, the pilot tube can easily be cleaned. If the pilot tube is dirty, let the furnace cool down and turn off the gas. It can easily be cleaned off with fine grain sandpaper.Ī dirty pilot tube can also prevent the pilot from staying lit. It may be that it’s dirty and needs cleaning. Be sure to inspect the thermocouple carefully. You can try bending the thermocouple back into position. Sometimes, this causes the pilot light to stay on for only a few seconds. It could simply be that the thermocouple is bent. A faulty thermocouple may arbitrarily determine that the light is off when you want it on and vice versa. The thermocouple detects the pilot light via sensors. Some common causes include issues with the thermocouple and pilot tube. If your furnace’s pilot light won’t stay on, the furnace won’t work. ![]() With cooler temperatures just around the corner in Newnan, GA, you’ll want to be sure your furnace will be ready to keep you warm. Originally published January 2014, last updated September 2019
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