$49 / month O.A.C Including Install
$49 / month O.A.C Including Install

Why Your Furnace Leaks

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Why Your Furnace Leaks

Posted On: November 24, 2024

Why Your Furnace Leaks

A leaking furnace can be a concerning issue, potentially leading to water damage and system inefficiency. Here's why your furnace might leak and what you can do about it:


1. Condensation Leak

  • Cause: High-efficiency furnaces (with AFUE ratings of 90% or higher) produce condensation during operation. This water typically drains through a condensate line. If the line is clogged, cracked, or improperly installed, water can leak.
  • Solution: Clear clogs in the condensate line, repair or replace damaged lines, and ensure proper installation by a professional.

2. Malfunctioning Condensate Pump

  • Cause: In systems requiring a condensate pump to move water to a drain, a malfunctioning or broken pump can result in leaks.
  • Solution: Test the pump for functionality and replace it if necessary.

3. Humidifier Issues

  • Cause: If your furnace has a built-in humidifier, leaks can occur from clogged lines, damaged seals, or excessive water pressure.
  • Solution: Inspect the humidifier for issues and repair or replace defective components.

4. Clogged Drain or Trap

  • Cause: Over time, debris and dirt can clog the furnace's drain or trap, causing water to back up and leak.
  • Solution: Clean the drain and trap to ensure proper flow.

5. Heat Exchanger Problems

  • Cause: Though rare, a cracked heat exchanger can sometimes lead to water leakage. It can also pose serious safety risks due to the potential release of carbon monoxide.
  • Solution: Contact a professional HVAC technician to inspect and replace the heat exchanger if necessary.

6. Incorrect Vent Pipe Installation

  • Cause: Condensation can form inside improperly installed vent pipes, dripping back into or around the furnace.
  • Solution: Have a professional inspect and correct the vent pipe installation.

7. Air Conditioning System Leaks

  • Cause: If your furnace and air conditioning system share the same housing, a leaking AC unit can appear as though the furnace is the problem.
  • Solution: Inspect the AC unit, including its condensate pan and lines, for leaks.

Preventative Measures:

  • Schedule annual maintenance for your HVAC system.
  • Regularly inspect and clean drain lines and traps.
  • Address any strange noises or performance issues promptly to avoid further complications.

If your furnace is leaking, it's essential to address the issue quickly to prevent water damage or operational inefficiencies. When in doubt, call an HVAC professional to diagnose and fix the problem.



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See What Our Customers Are Saying:

by Private User from Private User on Twintech Heating and Cooling

I have used Twintech many times over the years. They always arrive quickly and get the issue fixed. The most recent incident was when my air conditioner broke last week I called Greg at 11:30am and he was at my home by 2:30pm he had the unit fixed by 3:30pm. Twintech are very reliable and honest and they are experts in the field. I have already recommended them to many of my friends. I would not use anyone but them for my heating and air conditioning issues.

by Kate A in Pickering on Twintech Heating and Cooling

I would highly recommend these guys, professional, fast and competitive pricing. I moved into this place with no working AC unit with a 8 month baby, he was able to come with in a week to fix even in the busy summer days. He really values his customers , I am already recommending to my neighbors.

by Private User in Whitby on Twintech Heating and Cooling

Very impressed they arrive to quote even though I had forgotten to call them back to confirm date & time. They showed the day before installation to deliver the unit. Returned the next day as promised at 9am. Project was completed in a professional manner. They even fixed a few things that they noticed were not installed correctly, or to code by previous heating & air contractors we had at our residence before. Would recommend this company to everyone!

by Private User from Bowmanville on Twintech Heating and Cooling

Greg removed old oil furnace and oil tank from basement relocated new Napoleon propane furnace to allow duct work to be rerouted to a much more suitable location. Moved air conditioner to the new furnace. Dave recommended two available grants to assist with cost. They kept to their original quoted price which was substantially lower than a competitors for the same furnace and work. They completed the work as stated when stated and left the area clean and tidy. We are very pleased with the outcome.

by astephenson in Oshawa on Twintech Heating and Cooling

Twintech installed a Goodman furnace and ac init. Very professional install, both units are working well.

by rcnichols electric in Whitby on Twintech Heating and Cooling

We had Grant and Greg Dainty quote to replace our 20 yr old furnace. I have known them for years and have had other jobs done by them ( AC and Pool Htr). The price was very reasonable and the job was completed in one day.

by Rick. F. in Pickering on Twintech Heating and Cooling

TwinTech was the right choice. Our consultation with Dave set the tone. Professional and knowledgeable, we even received a follow-up call within hours of our install completion, wow! TwinTech arrived as scheduled to install our A/C unit. Within minutes of arrival Greg noted and explained a few out of code faults on our furnace installed by another company, problems fixed, thanks TwinTech. Greg, Grant and "Subaru" Pete were meticulous start to finish. Highly recommended!

by Taresh, Pickering on Twintech Heating and Cooling

Twintech replaced our aging +20 yrs old Furnace & AC with the variable high efficiency Napoleon Furnace matched with the Goodman AC. Sales guy ,Dave was great, gave a no pressure estimate, explained about the Government Rebate program which they took care of completely including arranging the home energy audit. On the scheduled day Greg and his team arrived on time, did a great job and completed the same day , extremely professional and courteous, cleaned up everything , tested the system, Greg took his time to explain the setup. Very impressed with the Napoleon Furnace 9600 which did a great job in maintaining a comfortable temperature last winter and now with the hot weather the Goodman AC cooled the house in much less time than the old AC unit could ever. From start to finish Twintech were great and have no hesitation in recommending them 100%.

by Private User Pickering, ON on Twintech Heating and Cooling

The Twintech team did an excellent job installing our new Goodman air conditioner. They were polite and professional. Greg was knowledgeable and clearly experienced. Thank you Twintech for bringing our cooling system up to current regulations. Job well done!

by Y. M. from Pickering on Twintech Heating and Cooling

Dave from TwinTech was very knowledgeable, professional and thorough in the buying process. He helped us to identify the best furnace for our home and our budget. When we needed a new filter a year later and seemed to have a problem finding the right one, I called Dave up and he delivered a filter to me the next day! The cost was on par with other retailers, but it was this unexpected personal service that really was impressive. The furnace? Works like a charm.

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See What Our Customers Are Saying:

by Aaron on Twintech Heating and Cooling

We are very happy to recommend this company to everyone. Our furnace broke down on Sunday morning. We phoned them and before noon Grant the owner showed up. He worked on the furnace for about a hour not wanting to give up to fix the problem. The furnace was 17 years old. I was the one talking about replacing it. End result was the next day it was all done. On the Sunday Bob came over with heaters to warm up the house. We decided to replace the water heater at the same time. Thanks Grant for the excellent work. Thumbs up.

by Linda on Twintech Heating and Cooling

Right on time. Explained how to work the HRV in a different way so the house would not be so dry. Changed my whole house water filter for me as well. Friendly, helpful, caring service!

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!

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