If have stumbled upon a puddle of water collecting around your furnace, you might be asking yourself, “Why is my furnace leaking water?” This is a common question we get from our customers, and there’s a few reasons why your furnace is leaking water:
1. Condensation Leaks
Modern furnace models are more energy efficient than older units. As these newer heating systems pump cool exhaust away from your unit it may cause an increase in condensation collecting at the base of your furnace and is one reason why your furnace is “leaking” water. If you don’t have a high-efficiency furnace, you may have an incorrectly sized flue pipe, since standard efficiency furnaces do not produce condensation.
2. Clogged Internal Drain
Your furnace shares an internal draining system with your air conditioner. If this drain becomes clogged or plugged it could be redirecting water into the furnace and causing it to leak water.
3. Leaky Humidifier
Furnace humidifiers are connected to your home’s plumbing system and use tap water to add moisture to your air. If your humidifier clogs or cracks it will cause water to leak from your plumbing onto your furnace, giving the perception that your furnace is leaking water.
4. Leaky Pipes Near Your Furnace
Similar to a humidifier leaking water onto your furnace, leaky plumbing pipes may also be to blame for your furnace leaking water. Additionally, a clogged plumbing pipe could cause a backup in a floor drain, also making it appear that your furnace is leaking.
5. Heat Exchanger
One of the most expensive repairs if your furnace is leaking water, a malfunctioning secondary heat exchanger could be the cause of a leaky furnace. If you can’t figure out why your furnace is leaking water, call us to diagnose the issue. If the secondary heat exchanger is broken, it may be time to install a new furnace to replace your old unit.
PLEASE REMEMBER: If your furnace is leaking, call a professional heating and cooling company to diagnose and fix your problem. Your furnace is an expensive investment, so attempting to repair the issue yourself could result in creating even bigger issues and expensive repairs.