What To Do If Your Germantown Furnace Is Leaking Water in Summer

Professional Services
June 12, 2025

If you're asking, "Why is my furnace leaking water in the summer," don't delay calling Professional Services for help. As the trusted experts for furnace repair in Germantown, Wisconsin, we can determine the exact problem and determine a customized, cost-effective solution. From Dheinsville to Willow Creek, we're 100% committed to the safety and comfort of our friends and neighbors.



What Causes a Furnace To Leak Water During the Germantown Summer?

Why does your furnace leak while you run your air conditioner? While they perform opposite functions, your cooling and heating systems are connected. Any of the following problems with your air conditioner could manifest as water around your furnace.


Clogged Drain Pipes Cause Water Backups

Because furnaces and air conditioners produce condensation, drain lines run from each device and out of the house. Like any other pipe or drain on the property, it can develop a clog, preventing the water from reaching its final destination. This usually happens when a lack of cleaning or maintenance allows dirt and dust to build up.


An Overflowing Drain Pan or Leaking Evaporator Coils Drip Water

The air conditioner drain pan collects water that drips off the evaporator coils inside the house. High-efficiency furnaces also produce condensation and have a pan to catch the byproducts of their heating. Depending on its location, a leaking evaporator coil may drip water that looks like a leaking heating device.


Sometimes, the furnace and air conditioner share a drain pan. The container can overflow if the drain line clogs, or it can rust and develop a leak. The water will look like it comes from the furnace.


Dirt Buildup or Refrigerant Leaks Cause Ice Formation on Coils

If you're asking, "Why is my furnace leaking water in the summer," examine your coils for ice buildup. Even in the heat of the Germantown summer, ice can form on the indoor coils. This happens most often if you have dirt building up on the coils or have a refrigerant leak.


As the ice melts, it will likely not fall into the drain pan. You'll see it pooling on the floor, and depending on its location, it may give the appearance of a leaky furnace.


Faulty Condensate Pumps Can't Redirect Water Properly

The condensate pump is a crucial component of your HVAC system, as it helps expel water from the drain pan. Because you install most HVAC systems in the basement, you can't rely on gravity to remove the condensation. The pump provides the power to remove the water from the home.


It's an electrical and mechanical component, so several things can go wrong. If it needs repairs or replacement, the drain pan may overflow until a plumber helps.


Follow These Steps When You See a Furnace Leak

Leaking is a relatively common furnace problem, so you should know how to handle it. Follow these steps if you suspect a leaky heating system.


1. Shut Off the System To Avoid Complications

If you're searching "Why is my furnace leaking water in the summer," start by shutting off your HVAC system. You won't know the exact cause of the problem without professional troubleshooting. If you stop using the air conditioner, you won't risk causing extra damage that results in more expensive repairs.


2. Clean Up Water To Prevent Damage

Clean up the water immediately to prevent any problems. Mold can start growing in just 24 hours but will cause long-term health complications and widespread damage. Use fans and towels to dry the affected area.


3. Ensure Your Family Can Stay Safe

While you wait for repairs, you may experience rising heat and excess humidity buildup. This can put you at risk of heat exhaustion if repairs take too long. Consider using fans to stay cool or leave the house to visit a Germantown business with air conditioning.


4. Call a Certified Professional for Repairs

Never make repairs yourself, as working on an HVAC system without proper training poses serious safety risks. Call for repairs promptly to keep your home at a comfortable temperature. Look for a reputable contractor that can respond immediately.

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Schedule Expert Service for Your Leaky Furnace in Germantown Today

Don't waste time Googling, "Why is my furnace leaking water in the summer," when you could call Professional Services at the first signs of a faulty furnace. Whether you live near Homestead Hollow County Park or Cedar Creek, you can rely on us for effective HVAC system maintenance and repairs in Germantown. We offer competitive prices, and you'll appreciate our friendly technicians.

You can schedule an appointment by contacting us today.

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