Is Your Furnace Leaking? Here Is What You Need To Know

Finding there is water around your heating system is not ideal, but it’s usually not a reason to panic. There are several reasons why water can accumulate around your unit. If you notice that your heating system is not working properly, then you don’t have to worry about it immediately. However, if you see water coming from the system, you must find the culprit.

Determining Why Your Furnace is Leaking

Before calling a professional to fix a furnace water leak, you should determine what is causing it. This can help prevent it from getting worse before you get it fixed. This article will discuss some of the common reasons why you might see condensation or water coming from your heating system.

1. Clogged Condensation Pipe

A clog in the PVC overflow pipe of your heating and cooling system can prevent the free flow of water that’s usually caused by the combustion of gas. If the pipe is not working properly, the accumulated dirt, ice, and dust can prevent the water from flowing out of the system.

When the condensation begins to form, it needs to be channeled out through the pipe. If the pipe is full of dirt, water will start to accumulate inside the unit. The accumulated water will eventually start to flow out of the system. This will be visible from the bottom of the unit.

2. Condensation Pipe Leak

If the water is dripping from your furnace, then it might be a drain pipe leak. This issue is similar to a clog in the exhaust pipe. Modern high-efficiency furnaces use PVC pipes instead of metal exhaust pipes. Due to the wear and tear on the pipe, it can become pierced. This will create a hole in the pipe that can allow a small amount of water to flow through it. This can’t happen with standard-efficiency units since they use metal flues or exhaust pipes.

If there’s a hole in the pipe, then the water will start to flow through it. This usually involves small amounts of water, but a clog in the drain pipe can cause a huge amount of water to accumulate around the unit. To fix this issue, you may need a new drain pipe installed. This can be completed by a reputable furnace repair service company.

3. Condensation Pump Issues

A condensation pump is a device that creates pressure inside the pipe to push the condensate out of the unit. This method is efficient and can get the job done quickly. If the condensation pump is not working properly, then the gas heater will not function properly. If you see water coming from the unit, then it might be a faulty pump.

4. Wrong Size Exhaust Pipe

If you have a standard-efficiency gas heater, then you don’t expect it to leak. However, if condensation forms, some older models have metal exhaust pipes as a safety measure. There are many reasons why older gas heaters start producing condensate.

One of these is the water coming from the overflow pipe. If the issue is caused by an incorrectly sized exhaust pipe, then it’s usually because the pipe is too small to allow adequate drainage. Other problems can include a faulty heat exchanger or gas leak.

5. Broken Whole-House Humidifier

A lot of gas furnaces come with whole-house humidifiers that are connected to the unit. These devices can hold a huge amount of water. Since the whole-house humidifier and the furnace are connected, there’s a chance that the latter can flood.

If the water is coming from the heater, then it might be caused by the humidifier. However, even if it’s another issue causing the leak, then it’s important to inspect the whole-house humidifier first.

If the amount of water that’s being used to humidify the air is not the same as it was before, then it might be a sign that the device is not using all of the water it’s supposed to. A small amount of water can be channeled through the connected part of the heater.

Final Thoughts

If you notice that water is dripping from your furnace, then you might need to call a professional to inspect it. In many cases, fixing the issue will require the ability to disassemble furnace components. This can be complex and time-consuming for homeowners and is best left to the experts.


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