Furnace 101: Why is Mine Leaking Water?

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Furnace 101: Why is Mine Leaking Water?

Posted On: November 7, 2020

Furnace 101: Why is Mine Leaking Water?

There could be several reasons your furnace is leaking water, but the most likely one is a condensation leak.


Usually, the condensation that comes from a high-efficiency gas furnace gets channeled to a floor drain. The leak could be caused by condensation tubing getting clogged or from breaks in the line. It may also be because the floor drain is clogged.


A standard-efficiency furnace with a metal exhaust pipe should not have any condensation. If it does, that could mean the flue pipe is not the right size. That could let the hot exhaust to cool down and condense inside the pipe, drain back to the furnace, and eventually leak.


Furnace Humidifier Issues


There may also be an issue with the humidifier which must be leaking inside the furnace. Of course, if your HVAC system receives annual checking and maintenance, this is a very unlikely scenario as your service technician would be able to detect this issue early.


If you have overlooked that tune-up, then you should make the call now because if it is, indeed, the problem, that leak could cause a lot of internal damage to your furnace.


Problematic Furnace Secondary Heat Exchanger


If the issue is not furnace condensation or problems with the humidifier, it’s possible that the source of water around your furnace is the secondary heat exchanger. You should really hope that it’s not, though, because if so, it’s going to be an expensive repair and might even require you to replace your furnace completely.


Clogged Internal Drain System


If your air conditioner is still running and it shares an internal drain with the furnace you’re using, then it’s possible that you have an internal drain system plug that is sending water to the furnace.


We cannot accurately diagnose your issue this way, but you should not let this go on for much longer. When your furnace is leaking, that is a clear indication that you have to call in professional help.


Leaks can result in much bigger issues that include damaging parts, not to mention ruining your flooring and walls. It may even lead to mold growth! A seasoned heating and cooling specialists like Twintech Heating and Cooling will be able to quickly find the source of the furnace leak for you and offer effective solutions to your furnace concerns. Do not hesitate to give us a call for any heating and cooling problems!




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See What Our Customers Are Saying:

by Nancy H. from Oshawa on Twintech Heating and Cooling

Work was performed in a clean and timely manner. The furnace and metal work was performed by the Twintech team (did not require separate contractor to do the metal work). Energy audit was arranged and promised rebates were received. The overall price was very competitive. We have recommended Twintech to several of our friends and family. Awesome job.

by Syd from Whitby on Twintech Heating and Cooling

Grant and Greg installed a heating and AC system in our new Linwood post and beam home. Post and beam can be challenging structures for running ductwork and their high ceilings and open concept frequently frustrate efforts at balancing air flow and controlling temperatures. But these guys did it and did it right the first time. Even the building inspector was impressed with what he saw. More importantly, the boys brought a high degree of trust and integrity to the job. Something in short supply these days.

by jenner iksmom from Oshawa on Twintech Heating and Cooling

Very polite and professional. They removed my o
ld furnace and A/C and installed my new ones. They were efficient and thoroughly cleaned up when they were done! I would highly recommend them!

by Rob from Toronto on Twintech Heating and Cooling

Pro from start to finish. They were able to fix my gas fireplace at very little cost as well.

by murray mcmichael from Ajax on Twintech Heating and Cooling

Excellent installation very knowledgeable gentlemen! Would highly recommend them to all my friends for any hvac work !

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.

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