Skip to main content

Blog

Why Is My Furnace Leaking Water?

Is your furnace leaking water? If there is a puddle of water on the floor in front of your furnace, it could be a few different things.

You just discovered there is a puddle of water on the floor in front of your furnace. What does this mean? Why would your furnace be leaking water?

It could be a few different things. In most cases, it is not a big repair, so keep calm.

However, you will need one of our MLD Services heating, ventilation, and air conditioning (HVAC) professionals to take a good look at it and resolve the issue for you.

Do not delay. Any issue dealing with water can quickly get complicated if not addressed in a timely manner. It can also speedily snowball into affecting other areas of your Leander home—like mold, creating poor indoor air quality (IAQ).

Schedule one of our highly trained professionals to come out to your Texas home as soon as possible.

There are a few different reasons your furnace could be leaking water, but the most common reason is a condensation leak. Before a causal determination can be made, our HVAC expert needs to know what type of furnace you have.

Is it a high-efficiency (condensing) or standard-efficiency (conventional) furnace? If you are not sure, it is easy to tell on your own. Take a look at its vent or exhaust pipe. If the pipe is white plastic (PVC), then your furnace is a high-efficiency system.

Another way to tell what is what is by the annual fuel utilization efficiency (AFUE) rating. If the rating is 90 percent or more, your furnace has a cool exhaust and produces condensation, therefore, it is defined as high efficiency.

On the other hand, if your furnace has a metal exhaust pipe, it is a standard-efficiency furnace and should not have condensation. It will have an AFUE below 90 percent.

Because No One Wants to Be in Deep Water

Many times furnaces have their AFUE rating printed on a yellow energy guide sticker in plain site on the unit, since the Federal Trade Commission (FTC) has very strict consumer product regulations for displaying energy usage.

How to Identify Your Furnace Type

Unfortunately this is not always the case, especially in older models. Taking a look at the vent or exhaust pipe is a fairly accurate technique, so do not worry if you do not know your furnace’s AFUE rating.

The Possible Causes of Your Leak

Again, the most common reason for a leaking furnace is a condensation leak. High-efficiency furnaces extract heat from the combustion gases for a longer period of time than a standard-efficiency furnace does, causing the gases to cool, then condense. Condensation is routed to a drain.

We Are Experts in All Facets of Furnaces

You might have a clogged condensation drain or tubing, a break in the condensation line, or issues with the condensate pump, if you have such a pump.

Read More of Our Articles

A standard-efficiency furnace extracts some heat from the combustion gases and quickly vents them out the exhaust or flue pipe. So there should be no water involved with a standard-efficiency furnace. If there is a condensation leak, the exhaust or flue pipe may be incorrectly sized.

Call 512-528-4258 Request Service

Ready for Honest, Reliable Comfort?

Contact MLD Services today for heating, cooling, and indoor air quality service in Leander and surrounding areas. Ask about flexible financing and maintenance plans when it's time.