Why Does My Furnace Leak Water? Know the Causes and Ways to Solve Them

Why Does My Furnace Leak Water? Know the Causes and Ways to Solve Them

Is your furnace leaking water? A leaky furnace is something you would not want to happen because of the risks associated with it. But if it occurs, do not fret! Our experts at T&L Air Conditioning will help you troubleshoot the problem.

Read on to discover the reasons why your furnace is leaking water.

High-Efficiency Furnaces

Do you have a high-efficiency furnace at home? You might be wondering why water is coming out of it. There could be many possibilities why this happens, so let us get into them one by one.

Furnaces like this one produce water via two heat exchangers. As these heat exchangers absorb a great amount of heat, the exhaust gas is converted from gas to liquid. Thus, condensation is formed which drains out automatically to the condensate line.

While running, high-efficiency furnaces normally undergo condensation. This is why they are called “condensing furnace.” This type of furnace requires only minor repairs when leaks are spotted. There are three (3) common reasons for leakage on condensing furnaces as the following:

  • Issues with the condensate pump
  • Clogged condensate drain
  • Problems on the condensate line

To fix the problem, you should start by checking the drain trap. See if it is blocked or clogged by dirt or debris. You can unclog the drain trap or ask your HVAC company to do it. However, if the issue is on the humidifier or condensate pump, you will have to schedule a repair service ASAP.

Conventional (Non-Condensing) Furnace

What should you do if your conventional furnace leaks water? Before devising a way to troubleshoot the problem, you should know the root of the issue first. Most likely, your conventional furnace is experiencing any of the following issues.

  • An Incorrectly Designed Vent Pipe

The flue (vent) pipe on conventional furnaces is designed to remove the gases away from your home upon combustion process. These gases should escape outdoors before they change into moisture. If the pipes are too large, too much air will circulate in the flue pipes. As a result, the gases in the flue might condensate or get trapped.

Do an initial inspection of the pipes to identify where the leaks sit in. For better result, contact a professional for help.

  • Leaky humidifier

For conventional furnaces with a built-in humidifier, leakage is possible. When the humidifier gets clogged, water may leak around the unit. To prevent leakage, your furnace should be serviced regularly.

  • Leaks occur when the A/C is turned on

If you noticed that your furnace only leaks when your A/C unit runs, the issue is not on the furnace itself but on your cooling unit. Try to find the source of the leaks by doing a comprehensive inspection of the system. Do it with the help of the experts.

Leakage in your furnace is not your typical do-it-yourself task. It requires professional attention and care. Call us at T&L Air Conditioning for an expert furnace inspection, repair, and maintenance.