Gas & Electric Furnace Repair Services. Why Is My FurnaceLeaking Water.Tips & Insights: Why is My Water Pressure Low? Problems & Troubleshooting Methods. Discover why your furnace is leaking water and how to fix it. Explore common causes like clogged condensate drains, frozen lines, and humidifier issues. 6 Reasons & TroubleshootingTips.Water leaking from your furnace can be caused by a condensation leak, faulty heat exchanger, or clogged air filter. However, the puddles near your furnace might have another source, such as your humidifier, air conditioner, or plumbing. Why Your Conventional (Non-Condensing) Furnace Is Leaking Water. Even though you have a non-condensing furnace, the root of the water leakage will still be condensation. However, there could be 3 different sources of the condensation: Leakyhumidifier. To better troubleshoot why your furnace is leaking water, you need to know the type of unit you have in your home.Repair or replace leakingfurnace? Many of the challenges that cause a furnace to leak can be repaired for a much smaller investment than replacing the entire unit. Furnaceleaks can be destructive if left untreated. A furnace repair specialist will diagnose the source of the problem and offer a lasting solution. But before an emergency furnace repair professional comes, here are some troubleshooting steps to take.