How do I know if my heat exchanger is cracked

Visible Damage. You may be able to see cracks in the heat exchanger when you visually inspect the furnace. … Soot. The presence of soot on the heat exchanger or on the furnace’s interiors is a warning sign of incomplete combustion. … Abnormal Flame. … Noticeable Odors. … Water on the Floor.

What are the symptoms of a damaged heat exchanger?

Strange smells. A malfunctioning heat exchanger will often create an unpleasant and strong odor that smells similar to formaldehyde.
Soot Build-up. …
Corrosion & Cracks. …
Change in the flame appearance. …
Audible Sounds. …
Presence of Carbon Monoxide.

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.

What are the four causes of a cracked heat exchanger?

Years of normal wear and tear. Believe it or not, cracks can develop in most furnaces after years of normal use. …
Poor airflow. …
Incomplete combustion. …
Oversized furnace. …
Undersized furnace.

What does a cracked heat exchanger smell like?

The System Produces a Strong Smell If your heating system produces a strong and unpleasant smell, it could be that the heat exchanger has cracked. Notably, the fumes usually smell like formaldehyde and are highly toxic to your body when inhaled.

How much does it cost to replace a cracked heat exchanger?

Were you recently told that your furnace heat exchanger is cracked and needs to be replaced? If so, here’s the thing: replacing a heat exchanger isn’t as simple or affordable as it sounds. In fact, replacing a furnace heat exchanger can take up to 8 hours and can cost anywhere from $2,000 to $3,500.

Does a cracked heat exchanger always leak carbon monoxide?

“A furnace with a cracked heat exchanger will definitely produce carbon monoxide and poses an immediate danger”. … If combustion gasses could move through a crack in a heat exchanger to the indoor air stream, it would defy the laws of physics. (See the cautionary note about 90% units.)

Can a cracked heat exchanger cause a fire?

Carbon monoxide poisoning is not the only possible danger a cracked heat exchanger presents. If combustible gas builds up in your heating unit and is released into your home through a fracture, it can lead to a potentially deadly furnace fire.

Is it worth replacing heat exchanger?

If your heat exchanger is cracked, your furnace is probably nearing the end of its life (18-20 years). If that’s the case, then it’s usually not worth the money to replace the heat exchanger. No matter who you ask, replacing a heat exchanger will be expensive. … Heat pumps can heat and cool your home.

How do you repair a cracked heat exchanger?

The best way to repair a cracked heat exchanger is to remove it and put in a new one. This doesn’t require replacing other parts of the furnace. However, it’s an expensive repair. Often a repair that’s too expensive compared to having a new furnace put in.

Article first time published on

What does the flame look like with a cracked heat exchanger?

Normally, your gas furnace has a steady blue flame. If your burner has a moving yellow flame, it could be dirty or have a cracked heat exchanger. Flames that flicker, lean, dance around or change when the fan comes on, are possible signs of a cracked heat exchanger.

How much does a furnace cost for a 1500 square foot house?

For example, a 700- to 1,500-square-foot home will require a BTU rating between 40,000 and 60,000, which will cost between $2,000 and $3,000. A furnace for a home ranging in size from 2,000 and 5,000 square feet will need between 125,000 and 150,000 BTUs and will cost in the neighborhood of $3,300 to $6,500.

What symptoms are observed when we inhale carbon monoxide?

Carbon monoxide poisoning typically occurs from breathing in carbon monoxide (CO) at excessive levels. Symptoms are often described as “flu-like” and commonly include headache, dizziness, weakness, vomiting, chest pain, and confusion. Large exposures can result in loss of consciousness, arrhythmias, seizures, or death.

How long do heat exchangers last?

In most cases, the heat exchanger determines how long your furnace will last. The heat exchanger is responsible for heating the air that circulates through your home in the winter. Heat exchangers usually last about 15 years. If you invest in maintenance, yours might even last 20.

Can a heat exchanger crack Be Fixed?

Unfortunately, heat exchangers cannot be repaired. When a heat exchanger cracks or rusts through it must be replaced. Because the heat exchanger is at the center of the furnace, nearly the whole furnace must be disassembled. Even if the parts are covered under warranty, the labor and freight will start around $500.

How much does a heat exchanger for a furnace cost?

Replacing a furnace heat exchanger costs $1,500 on average with a typical range between $1,000 and $2,000. Most have a warranty of 10 to 20 years, which usually only covers the price of the exchanger, which typically ranges from $500 to $2,000. Labor alone runs an average of $500.

How long do Goodman heat exchangers last?

The heat exchanger will typically last for the life of the furnace, which can be anywhere from 10 to 15 years or more.

How often should a heat exchanger be cleaned?

The association recommends reducing fuel costs by regularly cleaning heat exchangers to prevent fouling, which is often caused by a dirty, malfunctioning burner. Inspect heat exchangers at least once per year and clean them when they look dirty. Inefficient heat exchange is caused by scale and sediment buildup.

Do heat exchangers require servicing?

To keep the heat exchanger in good condition, regular maintenance is required. In addition to cleaning plates on a regular basis, gaskets must be replaced as needed to prevent leaks.

How hot does a home furnace heat exchanger get?

A mid-efficiency gas furnace can raise the temperature to 170F, but a high-efficiency model can only raise it to 150F. There are top quality furnaces that can raise it to 200F.

Why is my furnace rattling?

A bang or rattling sound from your furnace could mean that you have a cracked heat exchanger, which is the biggest cause of carbon monoxide leaks. … If you are hearing rattling while your furnace is on, however, it’s most likely because of loose connections in your duct system.

Can a heat exchanger leak water?

Leaking water A crack can cause the heat exchanger to leak water. This water will likely drip out from the bottom of the casing. If you’ve noticed a leak and can’t seem to find where it’s coming from, call a heating engineer to take a look in more depth for you.

What does a good furnace flame look like?

The burner flames from your natural gas furnace should look blue or almost completely blue. A healthy natural gas furnace flame is characterized by a roaring blue flame with a light blue triangle in its center. There may be a tiny tip of yellow. … Blue flames are hotter and indicate more complete combustion.

Can a furnace be too big for a house?

Having a furnace that’s too big for your space is extremely inefficient. There are two simple signs that indicate that your furnace is most likely oversized: Your furnace runs for a short period of time before shutting off. Your home has uncomfortable hot and cold rooms.

How long does a furnace last in a house?

THE AVERAGE FURNACE LIFESPAN A well-maintained furnace can last at least 15 to 20 years, but completing annual maintenance and being diligent with repairs can extend its life even longer.