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How Can Furnace Leaks Happen?
Posted On: February 2, 2025
Furnace leaks can occur due to several reasons, often stemming from issues with condensation, internal components, or improper ventilation. Here are the most common causes:
1. Condensation Issues
- High-efficiency furnaces (with AFUE ratings of 90% or more) produce condensation as part of their heating process.
- If the condensation drain line or pump is clogged or broken, water can back up and leak.
2. Clogged or Broken Drain Line
- Standard and high-efficiency furnaces use drain lines to remove moisture.
- Blockages in these lines cause water to accumulate and eventually leak.
3. Humidifier Leaks
- If your furnace has a built-in humidifier, leaks can occur if the water line or humidifier pad becomes clogged or damaged.
4. Heat Exchanger Problems
- A cracked heat exchanger can lead to water buildup and leaks.
- This issue is serious as it can also result in carbon monoxide leaks.
5. Improper Venting
- If the vent pipes aren’t properly installed, condensation can form inside them and leak out.
6. Internal Component Issues
- Malfunctioning secondary heat exchangers or damaged seals can allow water to escape.
How to Prevent Furnace Leaks
- Schedule regular maintenance to catch issues early.
- Keep drain lines clear of debris.
- Inspect and replace the humidifier filter if necessary.
- Ensure proper venting and installation to prevent condensation buildup.
If your furnace is leaking, it’s best to turn it off and contact an HVAC professional to diagnose and fix the issue before it leads to further damage.
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See What Our Customers Are Saying:
Aug 14, 2022
I had them replace my furnace last year. When it came time for the air conditioner this year, I did not hesitate to call Twintech again. I will also have them perform regular maintenance on them.
Aug 13, 2022
We required a new HVAC replacement after running the old
system for 18 years.
Dave understood our requirements and gave us a quote that
covered all the necessary items.
Installation was fast and very tidy. Everything works as
it should. Our thanks to Greg, Mitch and others for their
excellent work. Recommend this family owned business to
anyone else, considering HVAC or other work.
Aug 12, 2022
I needed a new furnace and A/C to replace my 21 yr. old units, and went to the internet to view potential companies in May, I received 3 quotes,
and chose Twintech based on their salesman Dave who was very detailed and covered off everything on what Twintech was all about,
an extremely dedicated company with so many years of experience, and after reading the on line reviews I was sold on Twintech, who did not disappoint as the installation team were top notch with Greg leading,
I would highly recommend this company without any doubts, in my books they are first class all the way. Our new Amana furnace and A/C are working perfectly !
Aug 11, 2022
Flawless transaction. They did exactly what they promised, showed-up on time, cleaned-up, and were highly professional. Highly recommended.
Aug 10, 2022
Salesperson and 2 man installation team were all professional and
knew their stuff. All three were friendly and helpful, answering all
my questions. The quality of their work demonstrated their experience
and expertise in their field.
Aug 9, 2022
A dear late cousin of mine recommended this company and I have been happy with the service.
Aug 8, 2022
We are very pleased with the work done by Twintech. They were very professional from start to finish. Dave came to our home and gave us a very competitive quote for new high efficiency furnace and air conditioner. The installers were very courteous and professional. We would highly recommend them.
Aug 7, 2022
Great experience getting an old furnace replaced.
Sales Guy (Dave) was great - honest, responsive, and friendly.
The work itself was done quickly and we are very happy with the outcome, thank you! We recommend TwinTech!
Aug 6, 2022
This review is late coming so my apologies to the amazing Twin Tech team! I contacted Dave at Twin Tech for a quote this past Feb (as I was collecting a few) and his recommendation was excellent. From the first meeting with Dave to the team installing the new furnace, not once did i feel uncomfortable . The team were extremely professional yet personable and clean and tidy. Decent companies still exist!
The new furnace just purrs and its just amazing the difference it has made!
(PS my sibling ended up getting a furnace from them as well)
Aug 5, 2022
The service was Twintech was excellent.
Dave our salesperson was easy to talk to and was professional. The unit recommended meets our needs and budget.
Greg and his team arrived on time for the installation and even got rid of the garbage the contractors left in our furnace.
Would definitely recommend Twintech.
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