Question: What Happens When Heat Exchanger Fails?

Why do heat exchangers fail?

Over time, the heat stress causes cracks near weak areas such as bends or welds.

The most common cause of an overheated heat exchanger is as simple as a dirty air filter.

A clogged air filter restricts airflow through the furnace, overheating the heat exchanger, and eventually resulting in stress cracks..

How much does it cost to replace a heat exchanger?

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.

Is it worth replacing furnace heat exchanger?

It usually takes 18 to 20 years for rust and corrosion to cause a hole to form in a furnace heat exchanger. If your furnace is old enough to have this problem, the heat exchanger probably isn’t worth replacing. … In most cases, you are much better off putting your money toward a new, high-efficiency furnace replacement.

When should I replace my heat exchanger?

Heat exchangers offer a typical service life between 10 to 20 years – depending on the life of your furnace and other factors, you may decide to replace the entire furnace if the heat exchanger requires replacement. Replacing the heat exchanger only comes with an average cost between $600 to $1200.

How do you know if your furnace is dying?

Signs may be frequent headaches, a burning feeling in nose or eyes, nausea, disorientation, flu-like symptoms. If you experience any of these symptoms, air out your house, open a window to the furnace room and immediately call a gas service technician.

Can a heat exchanger be repaired?

Can the exchanger be repaired or replaced? 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.

How long should a heat exchanger last?

20 yearsWhile heat exchangers are typically manufactured to last between 10 – 20 years, many factors can accelerate the process of heat exchanger failure.

What are the symptoms of a damaged heat exchanger?

If you or other family members experience continual recurring headaches or flu-like symptoms, this could indicate a cracked heat exchanger. Leaking combustion gases would be the culprit. Recurring nose and/or eye irritation, sleepiness, disorientation, and nausea would also all fall under this source umbrella.

How do I know if my furnace has a broken heat exchanger?

A gas furnace that is functioning will have a stable blue flame. If you notice your burner has a yellow flame that moves, it means that either your burner is dirty or that the heat exchanger is cracked. Note: Flames that flicker or bend more when you turn on the fan are a good indicator of a cracked heat exchanger.

Can a cracked heat exchanger cause a fire?

Cracks in the heat exchanger or “Fire Box” is no laughing matter. There are two major dangers with having a broken heat exchanger: The first is the potential for the furnace to catch fire and potentially spread to other parts in the home. The second danger is carbon monoxide emissions.

Do all furnaces have heat exchangers?

Every furnace contains a heat exchanger. It’s an essential part of the heating process. To create heat, your furnace combusts fuel—typically gas, but other varieties exist—in a sealed chamber.

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.

Is a 2 stage furnace worth it?

The two-stage furnace is more efficient than the one-stage because it doesn’t release as much fuel into the heat exchanger when the home is only somewhat cold. If it’s 5 to 10 degrees outside, a two-stage furnace will run in the partially-open position and only use 70% of the energy it normally would.