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The Dangers of a Leaking Furnace

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The Dangers of a Leaking Furnace

Posted On: January 28, 2025

The Dangers of a Leaking Furnace

A leaking furnace can pose significant risks to your home and family. Here's a detailed look at the dangers, causes, and solutions to protect your household:



1. Dangers of a Leaking Furnace

a. Carbon Monoxide Poisoning

A leaking furnace can release carbon monoxide (CO), a colorless, odorless, and deadly gas. Symptoms of CO exposure include headaches, dizziness, nausea, confusion, and, in severe cases, loss of consciousness or death. Even small leaks can be harmful over time, making proper maintenance essential.


b. Fire Hazards

Furnace leaks, particularly those involving gas or combustible materials, can create fire hazards. Gas leaks can ignite if exposed to an open flame or spark, posing a serious safety threat to your home.


c. Water Damage

In high-efficiency furnaces, water leaks are common due to condensation issues. This water can damage floors, walls, and ceilings, leading to mold growth, structural deterioration, and costly repairs.


d. Increased Energy Bills

Leaks reduce the furnace's efficiency, forcing it to work harder to heat your home. This results in higher energy consumption and inflated utility bills.



2. Common Causes of Furnace Leaks

a. Cracked Heat Exchanger

A cracked heat exchanger can lead to carbon monoxide leaks and is one of the most dangerous furnace issues. Over time, heat exchangers can deteriorate due to age, overheating, or lack of maintenance.


b. Condensation Drain Issues

In high-efficiency furnaces, condensation drains may clog or crack, leading to water leaks. Improper installation or poor maintenance often exacerbates this problem.


c. Loose or Damaged Seals

Seals within the furnace may wear out over time, allowing gases or water to escape. These issues can often go unnoticed until a leak becomes evident.


d. Gas Line Problems

Faulty gas connections or leaks in the gas line can lead to dangerous situations, including fire risks and CO poisoning.



3. Signs of a Furnace Leak

  • Unusual odors (e.g., sulfur, metallic smells)
  • Water pooling around the furnace
  • Soot or discoloration near vents or the furnace
  • Increased humidity in the home
  • Frequent headaches or flu-like symptoms among family members

4. Prevention and Solutions

a. Regular Maintenance

Schedule annual furnace inspections by a certified HVAC technician. Routine checks help identify and address potential problems before they escalate.


b. Install Carbon Monoxide Detectors

Place CO detectors near bedrooms and furnace areas to alert you to dangerous gas levels. Test them monthly and replace batteries as needed.


c. Address Repairs Promptly

If you suspect a leak, contact a professional immediately. Delaying repairs can worsen the problem and increase risks.


d. Upgrade to a Newer Furnace

If your furnace is old or experiencing frequent issues, consider replacing it with a high-efficiency model. Modern furnaces are safer and more energy-efficient.



5. When to Call a Professional

Contact an HVAC technician immediately if you notice any signs of a leak or suspect your furnace is malfunctioning. Professionals can conduct a thorough inspection, repair damage, and ensure your system operates safely and efficiently.



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See What Our Customers Are Saying:

by Craig in Whitby on Twintech Heating and Cooling

I called Twintech during the Covid 19 crisis because our furnace was broken and it was still very cold during the nights. Dave answered all of my questions by phone but wanted to come have a look but only if our family felt comfortable having someone visit during the uncertainty surrounding the pandemic and was able to attend that very same affternoon.

He was very courteous and informative but most importantly he respected his and our safety by wearing medical gloves in our home and maintaining proper physical distancing. He reviewed the various options of the products that suited our needs going over not only price but quality of workmanship, warrantees and where the product was manufactured which were all important factors in making such a large purchase. You could tell that Dave had been in this industry for a very long time.

The installation was done by a fine young gentleman the very next day and we now have a toasty warm home to ride out this crisis in while humming along at 96% efficiency!

I would recommend this very professional, small family business for anyone in need of HVAC equipment or maintenance.

by Lucy in Markham on Twintech Heating and Cooling

My special thanks to Twintech teams! They had replaced my furnace and A/C, and installed a new humidifier for me 2 weeks ago. Dave, the sales manager, not only provided me with an honest quote on the best HVAC products with best quality and warranties, he also arranged portable heaters for me and sent supporting docs to energy company for energy audit. Above and beyond service!

Greg, Grant, Mitch had worked tirelessly and professionally to perform the HVAC installation. They worked with professional tools, and performed proper measurement readings after installation. They are very patient with all my questions, and very pleasant to communicate.

Great work guys! This company sure knows their products and they stand behind their services. My home comfort level has improved! I am glad that I can support an ethical and honest local family business.

by ddame on Twintech Heating and Cooling

Professional, flexible on price and delivered on time...well done. All you can ask for when getting a new furnace.

by nicole.el.thorn on Twintech Heating and Cooling

The work was done quickly and professionally. Workers were really polite and easy to work with.
Product works great!

by Gary in London on Twintech Heating and Cooling

Furnace broke down on a Wednesday, shopped around for prices and Friday Twintechs name came up from a referral from my wife's work. Called Dave 11 am, he came over around 1 pm. Gave me a very good price, I accepted. The guys were there two hours later to take the old furnace out and install the new one. All finished by 6:30pm. Finally heat.
They were very pleasant and helpful. As a result we are doing our A/C later this year with this company.

by Shawn L in Whitby on Twintech Heating and Cooling

After some extensive research, we settled on Twintech for our new furnace. The service - from Dave's initial visit - through to the installation was absolutely fantastic.

Dave was super-patient with our many questions, did not try to "up-sell" us into buying things we don't need, knowledgeable, friendly and all-around an excellent Advisor.

I've forgotten the names of the installers but they were superb as well. They showed up on-time, did all the work with no mess or intrusion, removed the old furnace and installed the new one in one day; all with no impacts to our day-to-day life.

I cannot recommend Twintech enough, especially over any of 'bigger guys' who tried to sell us a bunch of thing we don't need. Twintech were fantastic and my wife and I are very pleased with our purchase.

by Stephen from Pickering on Twintech Heating and Cooling

From the minute I met Dave and discussed my new furnace needs I knew I was in good hands. He was patient, knowledgeable and very professional through the quotation process.

Grant and Greg did an outstanding job on the install. They did a great job of explaining the defects with my old furnace. The quality of the installation was excellent and the attention to detail was on another level. The old adage “You get what you pay for” couldn’t be more true as I feel I received great value, skilled expertise and high quality customer service. I highly recommend Twintech for all your heating and cooling needs.

by Arthur on Twintech Heating and Cooling

Glad to have found a not-too-big local firm that provided the needed expertise, quality workmanship, and competitive pricing as well. In and out in one day, removed the old units, did a nice job installing all of the new units, and left no debris. Even have a service contract that far outshined the big company offerings. Would definitely recommend them.

by Leriksen on Twintech Heating and Cooling

Appreciated a quick response to my request. Dave and Greg were very professional and made the experience seamless.

by petesalmon938 from Pickering on Twintech Heating and Cooling

Very professional through the entire process. Installation and removel was done on a sloppy winter day, they put down runners on the floors and stairs and when they left, there wasn;t any sign of someone being in our house. Furnace works great as promised.

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See What Our Customers Are Saying:

by Robert Rogers on Twintech Heating and Cooling

Very pleased with the professional service that TwinTech Heating and Cooling provided in replacing my furnace. I got several quotes from different service providers. Their price was excellent and they explained the features very well. We are very glad we went with TwinTech and highly recommend their services.

by Robert Mizuno on Twintech Heating and Cooling

We were new homeowners in need of a second opinion. TwinTech Heating & Cooling were Amazing and professional. Very knowledgeable and great service all around. Recommend to anyone looking for honest and reliable services. Treated with respect and care. Thank you Greg, Mitch and Bob!

by Ruth on Twintech Heating and Cooling

TwinTech is an excellent and honest company! I called them for a second opinion after being told by another company that I needed to replace my furnace. Turns out this was not the case at all! I did not need a new furnace. TwinTech did not push to make an unnecessary sale and saved me from a huge expense. Bob and Mitch were extremely professional and above all honest! I definitely recommend TwinTech!

by Anna Chin on Twintech Heating and Cooling

Amazing experience with TwinTech Heating & Cooling! Their team was professional, knowledgeable, and efficient from start to finish. They installed my new furnace quickly and left everything spotless. The technicians took the time to explain everything and made sure I was comfortable with the system before they left. Great customer service and fair pricing. I highly recommend them for anyone needing HVAC services!

by Connor Agnew on Twintech Heating and Cooling

Great experience all around. Bob was sharp and easy to talk to, and Greg handled the installation perfectly. Would hire them again in a heartbeat.

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