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The Dangers of a Cracked Furnace Heat Exchanger: A Homeowner’s Guide

The Dangers of a Cracked Furnace Heat Exchanger: A Homeowner’s Guide
HVAC Technician With One Hour Heating and Air Conditioning in Olathe, Kansas explains what it means to have a crack in your furnace heat exchanger.

A Crack in your furnace heat exchanger can be a serious issue. The heat exchanger is responsible for transferring heat from the combustion gases to the air that warms your home. If there’s a crack, it can lead to several problems:

  1. Carbon Monoxide Leaks: A crack can allow dangerous gases, like carbon monoxide, to escape into your home, posing serious health risks.
  2. Reduced Efficiency: A damaged heat exchanger can cause your furnace to operate less efficiently, leading to higher energy bills and inadequate heating.
  3. Increased Wear: A crack may cause the furnace to work harder to maintain temperature, leading to more wear and tear and potentially a shorter lifespan for the unit.

If you suspect a crack in your heat exchanger, it’s crucial to have a qualified technician inspect and address the issue immediately for safety and efficiency.

Carbon monoxide (CO) leaks from a cracked furnace heat exchanger can pose significant risks to health and safety. Here’s a deeper look into this issue:

What is Carbon Monoxide?

Carbon monoxide is a colorless, odorless gas produced during the combustion of fossil fuels. It can be emitted by furnaces, stoves, and other appliances that burn gas, oil, or wood.

How a Crack Leads to CO Leaks

When the heat exchanger cracks, it can create a pathway for combustion gases, including carbon monoxide, to escape from the combustion chamber into the air circulating through your home. This bypasses the intended venting system designed to safely expel these gases outside.

Health Risks of Carbon Monoxide Exposure

Exposure to carbon monoxide can be very dangerous. Even at low levels, it can cause symptoms like:

  • Headaches
  • Dizziness
  • Shortness of breath
  • Nausea

At higher concentrations, it can lead to severe health issues, including:

  • Loss of consciousness
  • Permanent brain damage
  • Death

Symptoms of CO Poisoning

It’s essential to be aware of the symptoms of carbon monoxide poisoning, which can often be mistaken for flu-like symptoms. If multiple people in your home experience unexplained symptoms simultaneously, it’s critical to act quickly.

Prevention and Safety Measures

  • Install CO Detectors: Having carbon monoxide detectors in your home can alert you to dangerous levels of CO. These devices should be placed near sleeping areas and on every floor of your home.
  • Regular Maintenance: Schedule regular inspections and maintenance for your furnace to catch any potential issues, including cracks in the heat exchanger, before they lead to serious problems.
  • Know the Signs: Be vigilant for signs of a malfunctioning furnace, such as yellow or flickering burner flames (instead of a steady blue), excessive moisture on windows, or soot buildup.

What to Do if You Suspect a Leak

If you suspect a carbon monoxide leak due to a cracked heat exchanger, immediately leave the premises and call emergency services. Do not attempt to locate the source yourself. Ensure that your family and pets are safe and ventilate the area as much as possible.

By understanding the risks associated with a cracked furnace heat exchanger and taking proactive steps, you can help protect your home and loved ones from the dangers of carbon monoxide exposure.

My Furnace Is NOT Working! What to Check BEFORE Calling For Furnace Repair

What to check when furnace not working?

If you are concerned that your furnace may not be working… whether your furnace is not turning on or if your furnace is blowing cold air, there are some initial checks you can do yourself.

If your furnace is not working, first ask yourself if anyone has been around or adjusted your HVAC system recently.

Sometimes your furnace power switch can be turned off or a furnace door does not get closed properly which can cause your furnace to not work.

These are innocent problems that when found, can save you a service call!

Other things to check when your furnace is not working:

1. A dirty filter could cause your furnace to not work.

2. If your furnace vents out the side of your house, make sure the vent is not blocked.

3. Make sure your thermostat is set to heat with a temperature that would call for heat.

If all of the above suggestions are in order and your furnace is still not working, try to do a reset of your furnace. Shut off the power to the furnace for about 10 seconds and then turn it back on. Sometimes that can help.

Indoor Unit Will Not Turn Off: Why Does My Furnace Keep Running?

When your indoor unit will not turn off it can be annoying, but sometimes if it continues to also heat…scary. We give detailed instructions on what to do if your furnace will keep running and will not turn off. Walk with us as we show you step by step how to fix a furnace that is not turning off and also signs that you may need a professional to help you. We hope this helps you save time and money when it comes to your home’s hvac system.

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