Carbon Monoxide and Heat Exchangers
Carbon monoxide, the poisonous, colorless, odorless and tasteless gas responsible for more than 20,000 visits to the emergency room every year, can pose a danger from unexpected sources in your home, including fireplaces.
What is a heat exchanger and why is it essential?
A furnace’s heat exchanger is a metal component that transfers heat from the fuel being burned while keeping the air in your home from mixing with the furnace exhaust. Sometimes the heat exchanger fails, either from cracks caused by constant expansion and contraction due to heating and cooling of the metal, or from rust. When a heat exchanger fails—under particular conditions—the exhaust gases, including carbon monoxide, can combine with the air in the house. A properly running furnace should not generate significant levels of carbon monoxide; however, a cracked or leaking heat exchanger can pose a safety danger.
What are the hazards correlated with a cracked heat exchanger?
A cracked heat exchanger could permit exhaust gas from the furnace to contaminate the household air with exhaust gases including carbon monoxide. In order for this to happen, the furnace must be giving off high levels of carbon monoxide and the exhaust gas must be combining with the household air. This could lead to serious health issues and even death.
What are the signs of a cracked heat exchanger?
In addition to a visual inspection to establish a crack, there are a few warnings of a potential issue with your heat exchanger that you may notice. If you turn the heat on and the flames flicker and appear devilish, this could be a indication that circulated air from the furnace is getting into the combustion area and you should have it examined by an HVAC technician. Although you certainly hope it doesn’t reach this point, other characteristics of trouble include carbon monoxide detectors sounding and you or your family members feeling sick, lightheaded or nauseous. To ensure the safety of all occupants, all homes should have a properly functioning carbon monoxide detector and batteries should be replaced frequently.
How can I be positive that my heat exchanger really has failed?
Service Experts’ ACE-certified technicians have received specialized training in diagnosing a cracked heat exchanger. As standard practice and in addition to physically observing the presence of a hole or crack, cameras are used. Whenever possible, the technician will show customers the failed heat exchanger—or at least a photo of it—so they can see for themselves. Additionally, an expert technician will test both the home and furnace for carbon monoxide. A properly operating furnace should not create significant levels of carbon monoxide. The technician will then warn the customers of the dangers associated with the failed part and offer professional advice regarding next steps.
What happens after an HVAC technician identifies a cracked heat exchanger?
Once you have a confirmed diagnosis from an expert, your fundamental question will likely be whether the part can be repaired or if replacement is the only option. Unfortunately, the industry standard is that the heat exchanger must be replaced. In fact, the American Gas Association says that any visible crack or hole is reason for requiring replacement of the heat exchanger or furnace.
If my heat exchanger has failed, do I have to replace the furnace?
While it may end up making sense to replace the furnace instead of only the heat exchanger, that is not always the case. Furnace warranties can vary—most furnaces have a 10-year warranty on the heat exchanger, while some are covered for 20 years or even for the life of the furnace. Our technicians will help you investigate the warranty on your heat exchanger and provide all the information you need to decide if replacing the heat exchanger or the entire furnace is right for you.
Service Experts Heating, Air Conditioning & Plumbing suggests changing your carbon monoxide detectors every five years and checking your carbon monoxide detectors every month to make sure the batteries and alarm are working properly. And by keeping up with the routine maintenance of your equipment, you will have peace of mind knowing that it’s going to be safe. If you suspect a problem with your heat exchanger or need to have an analysis of carbon monoxide levels in your home, call Service Experts Heating, Air Conditioning & Plumbing today at 866-397-3787 or schedule an appointment online.
Eight Common Heating Myths Debunked
There are plenty of myths out there about home heating that cause confusion and inefficient furnace operation. It’s time to get the facts out there. Here, the heating authorities at Service Experts Heating, Air Conditioning & Plumbing reveal the truth behind the eight most common myths to keep... Continue reading
How to Choose a Suitable HVAC System
When it comes to keeping your home comfortable year-round, nothing is more essential than picking out the right heating, ventilation and air conditioning (HVAC) system. This decision affects your daily comfort, monthly utility bills and overall home efficiency. Then again, with so many system... Continue reading
Year-End HVAC Maintenance Checklist
Now that the air turns chilly, you know it’s time to get your home ready for the cooler months ahead. Your heating system is critical to maintaining a cozy, warm setting. A well-maintained furnace supplies the comfort you want while using a smaller amount of energy. Regular inspections also make... Continue reading