I always took my home's heating and cooling system for granted. That is until I found myself battling one of the hottest days in years and my air conditioner simply refused to turn on. After contacting my local HVAC contractor, I learned that my cooling coils had frozen over from a lack of maintenance. He did get my AC back up and running that day, but he also helped me to look at my heating and cooling system in a whole new light. I have spent a lot of time over the last few years learning more about how to properly maintain my HVAC system and ultimately lower my energy costs. Today, I would like to share this knowledge with you so that I can help you to avoid some of the costly mistakes I have made in the past.
Although most gas furnaces are designed to operate as reliably as possible, you may still run into a little trouble with your furnace from time to time. If and when this happens, you'll want to know what problems to expect and how to deal with these issues as quickly and effectively as possible. The following describes five common issues you could run into throughout the course of your furnace ownership and how you can solve these issues.
If your furnace is the heart of your home's heating system, then consider the thermostat as the brains of the operation. But even the smartest thermostat can run into issues from time to time. For instance, the thermostat may stop responding to your inputs, suggesting a faulty battery or faulty thermostat wiring. A depleted battery may also cause the thermostat's display to turn blank.
If you run into these problems, start by replacing the thermostat's battery according to the manufacturer's specific instructions. Most thermostats use commonly available AA-size, AAA-size, or CR2032-type batteries. Afterwards, make sure the thermostat is working correctly. If not, you may want to have your HVAC technician make sure the thermostat is wired to your furnace correctly.
No Pilot Light or Faulty Electronic Igniter
Older gas furnaces rely on a constantly lit pilot light in order to start the main gas burner. A dirty pilot orifice, problems with the pilot's gas supply, or even a strong draft near the furnace can prevent the pilot light from remaining lit. If you can't keep your pilot light on, you may want to resolve one or more of these issues before manually relighting the pilot.
Newer gas furnaces rely on an electronic igniter, making potential problems a bit different. For instance, the igniter itself could prove faulty, preventing the furnace from starting. You should have an HVAC technician replace the igniter before attempting to restart your furnace.
A typical furnace duty cycle has it come on for a few minutes—usually long enough to reach the desired temperature set point—and shut down once it reaches that temperature. A short cycling furnace may only run for a few seconds before shutting back down and starting back up again. This constant on/off cycle can easily add years of wear and tear on your furnace in a very short amount of time.
A failed flame rod is one of the more common culprits of a short cycling furnace. If the flame rod fails to detect a flame from the main gas burner, the furnace will automatically cut off its gas supply until the furnace is ready to restart. Cleaning the flame rod is usually enough to solve this issue, but a replacement may be needed if the rod is damaged or defective.
Throughout its operation, superficial rust and soot can accumulate inside of a typical gas furnace burner. As a result, it may need occasional inspection and cleaning. If you're not getting enough heat from your furnace, it could be due to a clogged or otherwise malfunctioning main burner. In most cases, the main burner can be removed from the furnace and cleaned using a stiff-bristled brush and compressed air. The burner should also be checked for any excessive rust.
Clogged Furnace Filter
It's never a good idea to leave a filter inside your furnace for an extended period of time. Once the entire surface of the filter is filled with captured dust and debris, the resulting clog can severely reduce the amount of air that's able to flow into the furnace. This also makes it difficult for the furnace to circulate warm air throughout your home and adds unnecessary stress and strain on the blower fan motor and other components. In some cases, the furnace may even overheat due to a lack of proper airflow over the heat exchanger.
Fortunately, this problem can be solved simply by replacing the furnace filter on a regular basis. Most HVAC experts recommend replacing your furnace filter at least once every three months. If you or others in your home are suffering from allergies or if there's a smoker in your home, you can step up your furnace filter replacement regimen to a monthly basis. For more information, contact a company like Always Ready Repair.Share
1 February 2017