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Help! My Furnace is Leaking Water

Feb 18, 2020

Pool of water from your furnace or hot water tank romaniuk heating will be able to provide emergency repair services.

If your furnace is leaking water it might not seem like a big deal, but it could be the sign of a more serious problem with your appliance. If left unchecked, it could result in further issues with your furnace and more costly repairs.

Plus, even a little bit of water can lead to interior damage and mould inside your home, so it’s a good idea to get any leaks fixed as soon as you notice them.

Here’s everything you need to know about leaking furnaces so you can get the problem resolved before it turns into a more serious issue.

Do Furnaces Leak Water?

When you see your furnace leaking water you may be wondering “How does that happen?” Most people don’t associate furnaces with leaks so it might be confusing why water is suddenly coming out of your furnace.

However, furnaces actually do produce water in the form of condensation, so leaks aren’t uncommon.

High-efficiency furnaces use two heat exchanges, which is one more than conventional furnaces. They absorb so much heat that the exhaust changes from a gas to a liquid. Without getting too technical, what’s happening inside your furnace is that natural gas molecules are combining with oxygen to create CO2. And for every CO2 molecule created two water molecules are also created. This leads to a lot of water.

When a furnace is working properly, this condensation will drain out the condensate line. However, if something goes wrong with your furnace water may begin to leak out.

Why is My Furnace Leaking Water?

So, we’ve established that furnaces actually do produce water. But why would your furnace be leaking water? There are a few different issues that might cause this problem.

Cracked or Damaged Heat Exchanger

A crack in your heat exchanger is one of the most common causes of a leaky furnace. If the heat exchanger is damaged condensation can leak out and end up dripping out of your furnace and onto the floor.

A cracked heat exchanger doesn’t just cause leaks. It can also lead to carbon monoxide being released into your home. This is one of the many reasons to address any leaks in your furnace as soon as you spot them.

Faulty Condensate Pump

As we mentioned earlier, when your furnace is working properly any excess condensation will be drained out via the condensate line. Your furnace is equipped with a condensate pump that pumps the condensation into the drain and out through the line.

But if this pump stops working then the water will begin to build up inside your furnace. This can cause it to leak out of the pump, rather than flowing down the drain like it should.

Faulty Flue Pipe

It’s not just condensation that needs to be drained out of a furnace. Gases produced by your furnace also need to be carried out of your home and this is done through the flue pipe.

However, sometimes if this pump is installed incorrectly the gases move too slowly through the pipe. If gas sits inside the pipe too long it can begin to cool and create condensation, which might start to leak out of the pipe. This is why it’s important to not just monitor your furnace but also the pipes and connections leading from your furnace to ensure everything is working correctly.

Clogged Filter

Every furnace has a filter, and over time it gets filled with dirt and debris. Eventually, it will become clogged which can reduce airflow inside the furnace, leading to the coil freezing and your furnace to beginning to leak.

This is fixed by simply replacing the filter, but you shouldn’t ever let your furnace get to that point. A clogged filter puts a lot of stress on your furnace and could lead to more serious problems. Because of this, make sure to change the filter every 90 days.

Clogged or Damaged Humidifier

If you’ve added a humidifier to your furnace then this might be the source of your leak. Humidifiers are designed to add moisture to the air so they have water moving through them at all times. This means that if something goes wrong they can be prone to leaks.

Any sort of damage or clog inside your humidifier can lead to a leak, which can make it appear as if your furnace is leaking water. In this case, repairing or replacing the humidifier should resolve the problem.

How Do You Fix a Furnace That’s Leaking Water?

A leak from your furnace means something is wrong and leaving it could result in further damage. In some cases, not repairing the problem could jeopardize the health of you and your family. So, if you see your furnace leaking water you should call a professional immediately. An expert will be able to quickly diagnose the problem and make sure it gets fixed quickly and safely.

If your furnace is leaking water call us right away at 587-400-7333.

How Much Will it Cost to Repair My Leaking Furnace?

The cost to repair a furnace varies greatly depending on what the problem is. If your furnace is leaking give us a call and we’ll come and assess the situation. Once we know what the issue is we’ll provide you with an estimate of any parts and labour that are required for the repair.

Contact Us Today for All of Your HVAC Needs

Romaniuk has been serving the greater Edmonton area for over 30 years. Our team of certified experts is ready to help you with all of your HVAC needs. If you have a leaking furnace, or any other issue with your HVAC system, call us today at 587-400-7333.