Returning home to a pool of water around your furnace will leave anyone worried, and rightly so. When furnaces are working efficiently, do not leave a pool of water on the ground. So, water leaks signify an underlying issue.
Fortunately, the problem will rarely cause major damage to your furnace system if you take steps to fix it. As the premier choice for furnace repair services in Carmel, IN, we can tell you that most furnace water leaks are minor fixes.
Are you asking, “Why is my furnace leaking water?” We’ll cover all the possible reasons in this post.
High-Efficiency Furnace Systems and Condensation
Most people complaining about water leaks have a high-efficiency furnace system. This type of furnace is more likely to leak water because it produces condensation while running. The secondary heat exchanger absorbs heat from the exhaust gasses.
The cool gasses produce condensation, which flows into a drain line and away into your floor drain. Therefore, you can tie the most common causes of furnace leaks to a disruption in the condensation disposal process.
The Common Causes of Furnace Leaks
Some of the most common causes of furnace leaks include the following.
Clogged Condensate Drain Line
All the condensation your furnace system generates while running must flow through the condensate line to safely leave your home. However, dust, dirt, and debris can accumulate in the drain line over time, preventing the condensate from flowing through.
If the drain line is clogged, water backup will surely follow, hence the leaks around the furnace. Cleaning the drain line should fix the issue. If you’re asking, “Why is my furnace leaking water?” but can’t remember the last time you cleaned the drain line, that’s your answer.
Clean your drain line using a wet-dry vacuum or a long, flexible brush. You can also pour a few cups of vinegar solution down the line to break up any accumulated deposits.
Cracks in the Condensate Pan
The condensate pan under your furnace also helps collect condensation for onward removal through the drain line. However, the pan is metallic. It can corrode or crack after a few years of use. Any cracked or corroded drain pan will leak condensate.
You’ll need to call in HVAC professionals to fix condensate pan issues — unless you have the tools to repair cracked metal. Even then, it’s difficult to fix extensive corrosion. Your HVAC technician will evaluate the drain pan and repair or replace it.
Frozen Condensate Line
Did the temperatures fall below freezing recently? The water leaks around your furnace could signify a frozen condensate line. If the condensate line has frozen, water can’t flow through it. As a result, it will leak from other parts of the furnace.
You can fix a frozen condensate line by thawing it with a hairdryer, an electric blanket, or other portable heat sources. Avoid using open flames to avoid the risk of triggering fires.
Most importantly, you should try to understand why your condensate line freezes. Improving insulation and drainage can help fix the issue permanently in many cases.
Whole-Home Dehumidifier Damage
Most homes have a whole-home dehumidifier to help maintain the indoor humidity levels at an ideal range. Any leaks in the system may manifest as water leaks around your furnace. You can visually inspect the system for signs of damage.
Alternatively, you can leave it dry to see if the leak continues. You should talk to your HVAC technician about a possible replacement if it does.
Poorly Fitted Exhaust Pipe
This is a major cause of furnace leaks, but you’re more likely to see it with a standard-efficiency furnace. The vent pipe transfers combustion gases outside your home. Where the pipe can’t support the process, the combustion gasses will cool and cause condensation.
Call an experienced HVAC technician for evaluations if you suspect vent pipe issues.
Air Conditioner Leaks
Sometimes, the problem isn’t your furnace but the air conditioner. If you’ve recently used your air conditioner, it may have generated enough condensation to flood the drain pan and the floor around your furnace.
There’s a long list of reasons an air conditioner might leak water, so you’ll need to call an HVAC technician to evaluate the issue.
Get Professional Heating and Cooling Services Today
If you’re wondering, “Why is my furnace leaking water?” we recommend evaluating your condensate drain line first. If that doesn’t help, it’s time to call the experienced technicians at Complete Comfort Heating, A/C & Plumbing Repair for more in-depth troubleshooting.
You can call the Complete Comfort Heating, A/C & Plumbing Repair team in Greenwood, IN, today at (317) 343-8709 to book an appointment.
Learn more about the first things to inspect when your heating system fails.