How do I know if my heat exchanger is cracked?
Symptoms Of A Cracked Heat Exchanger
- The Furnace Flame No Longer Looks Blue.
- The Furnace Contains Soot.
- The Furnace Has Cracks Or Is Corroded.
- The Furnace Emits A Foul Smell.
- Final Words.
- Contact Lawes Company for All Your Home Heating Requirements.
What happens when your heat exchanger is cracked?
A cracked heat exchanger is pretty serious, as far as safety for your home goes. If there’s a crack in this component, the gases being burned off, such as carbon monoxide, sulfur dioxide, and nitrous oxide, could leak into your home, causing illness or, in extreme cases, death.
How often do heat exchangers crack?
If you’ve poorly maintained your system, rust can build on the components and develop cracks. The average lifespan of a furnace’s heat exchanger is 15 years. If your gas furnace is about that age, the chances are high that the heat exchanger can crack.
How long should a heat exchanger last?
In the past, heat exchangers were often built with heavy metals, such as cast iron. These exchangers can last as long as 30 or 40 years, much longer than the steel exchangers most manufacturers build today. Modern stainless or aluminized steel heat exchangers typically have a life span of 15 to 25 years.
Do all heat exchangers crack?
Overheating causes nearly all premature heat exchanger cracks. When a furnace cannot get enough airflow, the heat exchanger overheats and suffers excess stress from expansion and contraction. Over time, the heat stress causes cracks near weak areas such as bends or welds.
What is a bad co reading?
Flame stability has a lot to do with proper adjustments. You should read between 2 to 10 microamps normal is about 3 to 5.
How can you tell if your furnace is leaking carbon monoxide?
How to tell if your furnace is leaking carbon monoxide
- Heavy condensation appearing on windows where the furnace is installed.
- Sooty stains are appearing around the furnace.
- The physical appearance of soot, smoke, fumes or back daft in the house from the furnace.
- A burning like/ overheating smell.
What does it mean if your heat exchanger is cracked?
However, if the furnace produces a yellow flame, it can mean that your burner is dirty or your heat exchanger has cracked. But if the flame is yellow and also flickers, the chances are high that there are more damages in the furnace.
What does it mean when your heat exchanger is blue?
A typical furnace flame should be blue. If your furnace produces a steady blue flame, it’s clear that the furnace’s heat exchanger is functioning efficiently, and there’s nothing to worry about. However, if the furnace produces a yellow flame, it can mean that your burner is dirty or your heat exchanger has cracked.
What should the temperature be in a heat exchanger?
The heat exchanger is designed to be heated by the burner flames while the furnace blower moves room air across the outside of it. Under normal conditions, when the furnace is running, the air coming into blower from the house (return air) is generally 60 to 68 degrees F.
How does the heat exchanger in a furnace work?
The heat exchanger plays a central role in any furnace. It separates the warming flame from the air in the home. The burning fuel warms the heat exchanger which in turn warms the air in your home. What are the dangers of a cracked heat exchanger?
How can you tell if your heat exchanger is cracked?
If a heat exchanger becomes cracked, then your heating system will not perform as it should. There are certain signs to look for to determine if the heat exchanger has been cracked. The top signs include: A furnace flame should be blue in appearance. When the flame is blue, it means your heating system is functioning normally.
Can a crack in a heat exchanger cause air to move into the furnace?
As a result, any crack or hole or split results in air being pushed INTO the heat exchanger. There is no way air will move from inside the heat exchanger to the indoor air stream. This applies to residential gas furnaces with an air-conditioning coil mounted on the discharge.
A typical furnace flame should be blue. If your furnace produces a steady blue flame, it’s clear that the furnace’s heat exchanger is functioning efficiently, and there’s nothing to worry about. However, if the furnace produces a yellow flame, it can mean that your burner is dirty or your heat exchanger has cracked.
What’s the problem with replacing a heat exchanger?
The problem with replacing a heat exchanger is that the central cause of the problem is not addressed. In my opinion, heat exchanger failure is usually due to the furnace being oversized for the house or the duct work. The best solution is to replace the whole furnace with a right-sized furnace (typically 1-2 sizes smaller).
