Feb 01

Why is My Furnace Leaking?

image of a wet floor from a furnace leak

In a perfect world, machines and equipment never break down or grow old. They do not need to be replaced at all. Modern furnaces are made tough. However, this does not mean that nothing will go wrong. For instance, you might find that your furnace is leaking. A gas furnace leaking water is a hassle. It also causes discomfort in your household. Depending on the circumstances, the leak could also turn into something more severe.

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Reasons For A Furnace Leaking Water

In this article, we delve into the likely causes of furnace leaks and the steps you can take to resolve it.

Clogged Furnace Filter

image of a dirty hvac air filter

The furnace filters prevent dust, pet dander, and other contaminants from circulating throughout your home. However, these particulates can build up over time and decrease the filter’s effectiveness. Air cannot pass as it should, and this can cause the coil to freeze. As a result, water might leak. When this happens, you will see water pooling around your furnace. It is recommended that you check your furnace monthly. Clean or replace it when necessary so that this issue does not happen.

Condensation Leak

The heating process of your furnace causes condensation to form. This moisture travels through the floor drain or the pipes to ensure proper disposal. However, if the pipes are blocked or damaged, the water leaks out of the furnace instead. Therefore, you will see a puddle at the bottom of your furnace.

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Plumbing Leak

If your furnace is leaking, check your plumbing system as well. It might have clogged parts or broken pipes that are trapping water and debris. As a result, the drainage backs up, and a leak might appear at your furnace’s base. If a problem with your problem is the reason behind the leak, have them repaired by a professional right away. Otherwise, it can cause an issue with your heating system.

Humidifier Leak

Do you have a humidifier connected to your HVAC system? If so, the leak might be caused by the humidifier. Humidifiers are used to generate moisture to keep the indoor air from being too dry. However, a faulty humidifier could cause a leak into your furnace.


AC Leaking

image of air conditioner

If there is a leak while you use your air conditioning system and your furnace together, the cause might be your A/C unit. The cooling process also generates condensation, which is collected in the condensation pan. The pan will eventually get full and could overflow onto your furnace. It might look like the leak is coming from your heating system when it is actually coming from your AC.

Heat Exchanger Problem

If you have crossed off all possible causes, the heat exchanger could be the reason behind the leak. Depending on several factors, you will need to have the heat exchanger repaired or have a new furnace installed. This can be a severe and expensive problem. Seek professional attention to ensure you receive the best possible solution.

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Steps To Take When You Notice A Furnace Leak

Any leaking from your furnace needs to be checked by an HVAC expert. Therefore, schedule an inspection as soon as possible. While you wait, make sure you shut the system off. Turn it off via the breaker if you cannot locate the power switch. It would help if you also kept the bottom of the furnace as dry as you can. You can use a mop, rags, or a wet-dry vacuum to absorb the water. This way, you prevent water damage. Lastly, check the furnace filter. Replace or clean it if it is dirty.

Hire A Professional To Conduct Furnace Repair Services

Unless you are professionally certified or if the fix is a simple one, do not repair your heating appliance yourself. It is not recommended to call a handyman as well. You might damage it more if you do not have the proper knowledge, skills, and tools to fix it. When this happens, you’ll have to pay for costlier repairs and replacements.

Your furnace is a specialized machine that has complex components. It is best to have an HVAC expert to conduct proper inspection and diagnosis. They will ensure that any problem is resolved using the correct repair procedure.



Our furnaces are what keeps us warm and toasty during the winter season. A faulty one causes inconvenience and inefficiency. A leak on a well-maintained furnace can likely be fixed easily. If you have an older system, have a professional thoroughly check it to do the right repairs.

Call Skylands Energy Service For All Of Your HVAC Requirements

image of skylands energy service logoFor superior heating and cooling services in Central New Jersey, do not hesitate to contact Skylands Energy Service. Our company has professionally certified and highly trained technicians who provide top-quality HVAC services, such as installations, replacements, repairs, and maintenance. All our friendly techs have the knowledge and experience to perform accurate and prompt HVAC services at all times.

Rest assured that we offer affordable heating and cooling rates in the area. Our maintenance services help increase your home’s comfort, energy efficiency while reducing your HVAC costs. If you need a replacement system, we can help find the most suitable brand, make, and model that fits your home’s needs without sacrificing your budget. All our work comes with a guarantee. To book a service appointment, give Skylands Energy Service a call today. We provide free, no-obligation, in-home consultations.

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