Common combustion problems with high efficiency furnaces

Published on: July 20, 2023

Common Combustion Problems with High-Efficiency Furnaces

High-efficiency furnaces have become increasingly popular in recent years due to their ability to provide more heat while using less energy compared to traditional furnaces. However, with great efficiency comes the potential for unique combustion problems that homeowners need to be aware of. In this article, we will discuss some of the common combustion issues that can arise with high-efficiency furnaces and how to address them.

What is a High-Efficiency Furnace?

Before delving into the combustion problems, let’s first understand what makes a furnace high-efficiency. These furnaces typically have an Annual Fuel Utilization Efficiency (AFUE) rating of 90% or higher, meaning that they convert at least 90% of the fuel they consume into heat for your home. This is achieved through advanced technology such as sealed combustion, condensing heat exchangers, and variable speed blowers.

Common Combustion Problems

1. Incomplete Combustion: High-efficiency furnaces rely on precise air-to-fuel ratios for combustion. When this ratio is off, incomplete combustion can occur, leading to the production of carbon monoxide (CO). Symptoms of incomplete combustion include soot buildup around the furnace, a yellow or flickering flame, or a rotten egg smell. To address this issue, it is crucial to have your furnace regularly serviced by a professional such as Martino HVAC to ensure proper combustion.

2. Flame Rollout: In some cases, the flame in a high-efficiency furnace can rollout from the burner assembly instead of being contained within the combustion chamber. This can be caused by a blocked flue or heat exchanger, which poses a significant safety risk as it can lead to fires or carbon monoxide leaks. If you notice flames outside of the burner assembly, turn off your furnace immediately and contact a qualified HVAC technician like Martino HVAC for inspection and repairs.

3. Ignition Problems: High-efficiency furnaces often use electronic ignition systems, which can malfunction due to issues such as faulty wiring, sensor problems, or component wear. A furnace that struggles to ignite or frequently cycles on and off may indicate an ignition problem. If left unresolved, this can lead to inefficient combustion and increased energy bills. Martino HVAC technicians are skilled in diagnosing and repairing ignition issues to keep your furnace running smoothly.

Preventing Combustion Problems

To prevent common combustion problems with high-efficiency furnaces, regular maintenance is key. Martino HVAC offers comprehensive furnace maintenance services that include inspection of combustion components, cleaning of burners and heat exchangers, and testing for proper airflow and gas pressure. By scheduling annual maintenance with Martino HVAC, you can ensure that your furnace operates efficiently and safely throughout the heating season.

In conclusion, while high-efficiency furnaces offer significant energy savings and comfort benefits, they also come with specific combustion challenges that homeowners should be aware of. By understanding the common combustion problems discussed in this article and entrusting your furnace maintenance and repairs to a reputable company like Martino HVAC, you can enjoy the full benefits of your high-efficiency heating system without compromising on safety and efficiency.