Why is my furnace leaking water?

Why is my Furnance Leaking Water

There are several reasons why your furnace could be leaking water. No one wants to come home and find a puddle of water pooling around their furnace. Especially if it also happens to be the middle of winter! Most of the time, it’s not an expensive repair, so there’s no reason to panic. The first step to resolving the issue is identifying where the water is coming from and why. It all starts with knowing what kind of furnace you have. 

High Efficiency or Standard Efficiency Furnace?

High-efficiency furnaces pull heat from combustion gases for longer than a standard-efficiency furnace, which creates condensation. The condensation is typically routed to a drain in the floor. Whereas a conventional or standard efficiency furnace also pulls heat from the combustion gases but quickly vents out the exhaust or vent. If you’re not sure which type of furnace you have, most have their AFUE (Annual Fuel Efficiency) rating posted on the unit itself. If this isn’t the case, the best way to tell which type of furnace you have, look at the exhaust pipe. If the pipe is made from PVC plastic, you have a high-efficiency furnace, and that means there’s a good chance your leak is a condensation leak. 

Condensation Leaks

Condensation leaks are usually the culprit when it comes to a leaking furnace. It could be the result of wear and tear on the condensation tubing or a clog in the line. Both are relatively simple fixes. However, if the reason for your leak is not easily identifiable, it could mean you have a more severe issue with your system. 

Other Issues

Some other issues that can result in water leaking from your furnace include:

  • Malfunctioning condensation pump
  • Faulty humidifier
  • Incorrectly sized exhaust or flue pipe
  • Internal drain system clog

The most valid reason your furnace could be leaking is the secondary heat exchanger malfunctioning. If this is the case, you may be better off replacing the furnace rather than repairing or replacing the heat exchanger. It will save you money in the long run.

The best way to prevent a leak in your furnace is hands down – regular maintenance. Many times, it’s the lack of maintenance on a system that causes a problem in the future. If you have questions about your furnace or are experiencing issues with water leaking, contact the professionals at Advent Air and schedule your service call today