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What to Know: Possible Reasons Why Your Furnace is Leaking


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Your furnace is one of the most essential pieces of equipment in your home, and it’s important to keep it well-maintained. A properly working furnace will keep your home warm and comfortable during the winter months and can help to prevent costly repairs.

If you take good care of your furnace, it will take care of you. Be sure to change the filter regularly and have it serviced by a qualified technician at least once a year, and your furnace will keep your home warm and comfortable for years to come.

Today, let’s explore a common problem with your furnace—leaking water. Why does this happen, and what can you do to solve it? Here’s what you need to know:

How Does a Furnace Work?

A furnace works by circulating air through a series of coils or pipes. The air is heated as it passes through these coils or pipes, then circulates back into the room. 

Furnaces have a thermostat that controls the temperature of the air being circulated. The thermostat is set to the desired temperature, and the furnace will turn on and off to maintain that temperature. 

Various fuel sources, including natural gas, oil, electricity, and wood, are powered by furnaces. Each type of fuel has its advantages and disadvantages. 

What Could Cause Your Furnace to Leak Water?

Your furnace is essential to your home, providing warmth and comfort during the colder months. But what do you do when your furnace starts leaking water?

There are many reasons why your furnace may start leaking water, and it’s essential to identify the cause so you can take the appropriate steps to fix the problem.

A clogged drain line is one of the most common reasons a furnace starts leaking water. The drain line is responsible for carrying away any water that condenses on the heat exchanger. If the line becomes clogged, the water has nowhere to go and will start to leak out of the furnace.

Another possible cause of a furnace leaking water is a cracked heat exchanger. The heat exchanger is the part of the furnace that heats the air and is exposed to a lot of heat and stress. Over time, this can cause the heat exchanger to crack, allowing water to leak out.

If your furnace is leaking water, it’s important to identify the cause so you can take the appropriate steps to fix the problem. If unsure what’s causing the leak, it’s best to call a professional. They will be able to pinpoint the problem and make the necessary repairs.

What to Do When Your Furnace Leaks Water?

If you find your furnace leaking water, there are a few things you can do to try and fix the problem. First, check to see if the leak is coming from the condensate line. If so, make sure that the line is not clogged or frozen. The problem may be with the condensate pump if the line is clear. Try cleaning the pump and making sure that it is properly installed. If the problem persists, you may need to replace the pump.

If the leak is not coming from the condensate line, it will likely come from the heat exchanger. This is a more serious problem—you should call a qualified technician to repair it.

The Bottom Line

It’s important to know why your furnace is leaking water. There are several possible reasons for this, so it’s important to troubleshoot and rule out each one. A furnace may leak water due to a blocked condensation line or needs to be cleaned, a problem with the humidifier, or a drain pan. When you can’t find what’s causing the problem, it’s best to call a professional to help diagnose and fix the issue.

If you are looking for furnace repair services in Pickering, we can help you. Climate Experts is a Canadian-owned and operated company serving the Durham region, GTA and the surrounding area. We install, service and maintain all major brands of furnaces and air conditioners. Our services are available 24/7 and for emergencies. You can count on us to get your HVAC system up and running in no time! Contact us today to learn more and get started.

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