gas furnace that is leaking water

Furnaces are built to last long. However, just like any other machine, they are not indestructible. Heating units also grow old, are susceptible to breakdowns, and will eventually need replacements. There will come a time that something will go wrong with your furnace, such as leaking. A gas furnace leaking water will only disrupt your home comfort. It will also cause inconvenience and even turn into something potentially dangerous.

In this article, we will discuss the different causes your furnace is leaking water.

Reasons For A Furnace Leaking Water

Listed below are a few of the reasons our furnace is leaking and the corresponding actions to do about it.

Condensation Leak

Many modern furnaces are highly-efficient and have high annual fuel utilization efficiency (AFUE) ratings. The heating process of your furnace means that condensation forms. The moisture accumulation will pass through the pipes or the floor drain. If you have blocked or damaged pipes, the water will leak out of the furnace. One of the usual signs that this is the cause of leakage is water pooling at the furnace base.

Humidifier Leak

A home humidifier connected to your HVAC unit can be another source of leaking. The humidifier’s job is to produce moisture to keep the air from being too dry. If there is an issue with your humidifier, water can leak into your furnace.

Plumbing Leak

The plumbing system in your home might be the cause of the leak that is trickling down to your furnace. Therefore, it is a good idea to inspect your plumbing when you suspect that your furnace is leaking. There might be broken or clogged pipes that trap water and debris. This will cause the drain system to back up, and there will be a leak at the bottom of your furnace. If the leak is due to your plumbing pipes, call a professional to resolve the issue right away.

Clogged Furnace Filter

image of a dirty furnace filter

The furnace filter’s job is to trap dust, dirt, and other particulates to keep them from being distributed throughout your house. The filter gets clogged over time. When this happens, its effectiveness declines, and the air is not able to flow correctly. Without proper airflow, the coils will freeze and cause water leakage. The latter is evident when water pools around your furnace. Make sure to check the furnace filter regularly. Clean or replace it when necessary so that this issue does not happen.

A/C Leak

image of an air conditioner compressor

If there is leaking while you are using your air conditioning system and your furnace simultaneously, the culprit might be your AC unit. Water from your AC is drained into the condensation pan. When the pan is full, the excess water overflows into the furnace. If this is the case, you might mistake your furnace as the cause of the leak when it is actually because of your AC. Contact your local trusted HVAC technician to help you deal with any issues you have with your system.

Heat Exchanger Leak

If all probable leak causes have been explored, but you still haven’t found the leak, the problem might be the heat exchanger. Unfortunately, leaking issues with the heat exchanger can be severe and expensive. The heat exchanger needs to be repaired, or you might need to purchase and install a new furnace. Call a certified HVAC professional to determine all possible solutions to your HVAC problem.

Steps To Take When Your Furnace Is Leaking

When you notice that your furnace is experiencing any leaking, contact a professional, and book an inspection appointment immediately. Before the HVAC tech arrives, here are some of the things you can do:

Hire Professional Furnace Repair Services

image of an hvac contractor repairing furnace

It is always recommended that your furnace receive professional attention when it is experiencing problems. It should not be a do-it-yourself project unless you have the necessary training, certifications, and skills to do so or if the fix is as simple as changing the filter. You might cause more harm than good if you do not know what to do. You might even end up shelling out hundreds or thousands of dollars in HVAC repairs and replacements.

A furnace is a piece of specialized equipment and has many complex components. It is best to have a professional furnace repair technician to check your HVAC equipment. Do not call a handyman. HVAC technicians have the skills, knowledge, and experience to make a proper diagnosis and conduct the necessary steps to resolve all issues.


Our furnaces keep our homes safe and warm during the winter season. It is certainly inconvenient and unsafe to have your furnace break down when you need it the most. If your furnace has a leaking problem, make sure to have a professional check it, so that correct repairs are done as soon as possible.

Call Tower Energy For All Of Your HVAC Requirements

Tower Energy Logo
Tower Energy provides heating and cooling services in Hartford County, Connecticut. Our company only hires the best-certified technicians who can conduct high-quality HVAC services, including furnace repairs, boiler installations, AC maintenance, and ductless system replacement, among others. Each of our experienced and knowledgeable professionals can conduct accurate and prompt HVAC services every time.

Tower Energy offers affordable heating and cooling service rates in the area. Need a new HVAC system? No worries. Our techs can recommend you the most suitable make and model for your home while staying within your budget. Our tune-up services are guaranteed to improve your home comfort, efficiency, indoor air quality, and cost-effectiveness as well. All our work comes with a guarantee. Schedule a service appointment with us today. We provide free, in-home consultations.

Contact us now or call us at (860) 677-7347 to find out more.