Before performing DIY furnace maintenance, Richard makes sure to switch off the electrical power and the fuel supply. The distinctive red power switchplate can usually be found at the top of the cellar stairs or near the burner itself, while the fuel shutoff valve is near the oil tank or on the incoming gas pipe. Note the location of both in case of a future leak or fire.
Great article! I am having trouble identifying what to use for the aluminum or zinc strips to prevent organic growth and staining. How wide are the strips? Are they predrilled? I am starting to see black stains on the north facing asphalt shingles. Do you recommend treating that befor adding the metal strips? If so, 50/50 bleach and water or a commercial product?

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When a furnace maintenance is performed a combustion analysis should be performed to identify any problems that couldn't be found by a visual inspection. You want to know what the Carbon monoxide level your furnace is producing as well as the oxygen/CO2 levels and stack temperate. The analyzer will also give you a calculated efficiency rating with the information the analyzer receives. You should have >100ppm of Carbon monoxide output during normal operation of your gas furnace. When you have higher numbers or CO numbers increasing during operation their is a problem with the furnace the technician should then find the cause of. This is just a brief explanation I'm trying to get across to those who get their furnace maintained and to those who don't! Check to see if anyone in the company has a NCI certification for carbon monoxide/combustion analysis. 

Furnace Service Company


As a Carrier dealer, with a wide variety of products to choose from, we can keep your family healthy and feeling comfortable all year long. We carry a complete line of indoor comfort equipment with innovations that raise the standards of comfort and reliability, including air conditioners, heat pumps, gas furnaces, programmable thermostats, humidifiers, ductless split systems, air cleaners, ultra violet lights, ventilators and zoning products. Let the experts at A. Johnson Heating & Air help you customize a solution that's right for you.
If your furnace has a pilot light, look for the flame. Check your owner’s manual or the instructions posted inside the furnace cabinet for step-by-step lighting instructions. Usually this involves first turning the gas valve to Off and waiting a couple of minutes. Then you turn it to Pilot. Next, press and hold it down while you light the flame. Last, wait a minute or so, release it, and then turn it to On.
We concentrate on providing our residential and light commercial customers with superior service, installation, and replacement of heating and air conditioning systems. Our customers can count on our expertise in high efficiency heating and cooling equipment, air cleaners, humidifiers, boilers, heat pumps and in floor radiant heating. We are a Carrier Factory Authorized Dealer. We will help our customer choose the best product for their specific needs. We are very innovative and creative when solving many heating and cooling problems, including “in the floor hot water heat” and “hydronic zone heating” for different temperature requirements in the home or commercial building.
High-efficiency condensing furnaces (90% AFUE and above) are a bit more complex than conventional furnaces. The main differences between a conventional and condensing furnace are the heat exchanger technology used to extract heat from the combustion process and the method used to exhaust the combustion gases. In these ways, the furnaces are very different. The condensing furnace does not have a significantly more efficient combustion process than does a conventional furnace; both use gas burners with electronic ignition. The difference lies in that the condensing furnace has a more efficient heat extraction process after combustion.
Furnace tune ups should take anywhere from 45 minutes to hour and a half, depending on what the technician has to deal with when he gets there. I was a heating and AC professional for over 10 years and I had tune ups that only took me 30 minutes, and others where it seemed like I had to practically disassemble the entire furnace, clean, then put back together. Every call is unique. However, it's important you trust your contractor. Your instincts are more accurate than you probably give yourself credit for. I don't remember a tune up ever going less than a 1/2 hr in my 10 years of experience. It just takes time to setup, take down, and perform the actual maintenance. If you figure a minute per inspection point, it should have at least taken half an hr. I've showed up to furnaces that look flawless, and I still take them apart and clean them because that's what the homeowner paid me for. If there is even a hint of a cracked heat exchanger, get a second opinion. There are scams out there, and unfortunately a 20 minute inspection wouldn't reveal that. Have whomever is making the claim show you via camera or by physically removing the combustion chamber from the furnace and showing you. As weird as that sounds, I've removed heat exchangers out of furnaces just to prove that there was an issue. A cracked combustion chamber can be a serious issue, so the fact that he said it should be fine says either he doesn't know what he's doing or he's not being truthful, or both. It's not that cracked heat exchangers are leaking carbon monoxide, it's that they can. It's the potential that makes it dangerous. Hope this helps!

The chill of winter can be a scary thought when your furnace needs a repair. When the furnace in your home goes on the fritz, you need it fixed right away to keep your family safe and comfortable. Every BGE HOME technician is licensed in their trade and adheres to a stringent in-house certification program that guarantees their knowledge, affirms their commitment to the customer, and ensures excellence in completing every repair with the highest level of quality. Our technicians average 11 years in the HVAC industry, so you can rest assured that the technician who makes your furnace repair is knowledgeable and experienced.
At Bob’s Heating & Air Conditioning, we believe that our customers deserve to live comfortably throughout the entire year. That is why we offer such a comprehensive selection of air conditioning, heating and water heater services in Kirkland, WA. When you work with us, you can rest assured that your furnace is installed properly, your AC maintenance is meticulous, and that your water heater repairs are top notch. Contact us today to learn more about the heating and cooling services we offer throughout Kirkland, WA.

When our Denver heating company provides you with maintenance checks before the cold of winter sets in, you will be saving money in several different ways. One of the benefits of a maintenance plan is our technicians will be less likely to have to make repairs throughout the year as long as the system is properly maintained. Our Denver heating company will have your system running at its most efficient, helping to reduce your utility bills each month. An added benefit of a more efficiently running system is the positive environmental effect that it will have.
B&B Heating & Air Conditioning is a Carrier Factory Authorized Dealer, a recognition that is earned rather than given.  Our service team is fully insured, certified, and receives ongoing factory training at the highest level. To further protect your best interests, our technicians do not work off commission.  We provide honest, ethical, and no-pressure service, and offer recommendations that serve your long-term satisfaction.

Modern high-efficiency furnaces not only provide superior heating, they save money on energy bills, last longer and generate less noise. The hands-on experience, technical expertise and dedication of the team from Choice Heating & Cooling ensures that your new equipment operates at peak performance, providing consistent enjoyment for years to come. To further protect your investment, Choice Heating & Cooling offers prompt repair and comprehensive maintenance, delivering consistent warmth at fair prices.


When a furnace maintenance is performed a combustion analysis should be performed to identify any problems that couldn't be found by a visual inspection. You want to know what the Carbon monoxide level your furnace is producing as well as the oxygen/CO2 levels and stack temperate. The analyzer will also give you a calculated efficiency rating with the information the analyzer receives. You should have >100ppm of Carbon monoxide output during normal operation of your gas furnace. When you have higher numbers or CO numbers increasing during operation their is a problem with the furnace the technician should then find the cause of. This is just a brief explanation I'm trying to get across to those who get their furnace maintained and to those who don't! Check to see if anyone in the company has a NCI certification for carbon monoxide/combustion analysis.

Furnace Service Company

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