If you find water on the floor next to your furnace, you’re probably confused about what it means and what to do. And rightly so.
Although a furnace leaking water is a definite sign of trouble, there are several possible sources, some more serious than others. You really need a professional to determine exactly why your furnace is leaking water. Don’t attempt a DIY furnace repair; a mistake could be dangerous.
Here’s what you should do if you find your furnace leaking water.
Switch Your Furnace Off And Contact Husky To Solve The Problem
Turn the furnace off immediately to prevent water damage or an electrical hazard:
- First, set the thermostat to “Off.”
- Then close your gas line shutoff valve.
- Finally, go to your electrical box and switch off the breakers for your furnace.
Now contact Husky for furnace repair. Get in touch online or for immediate service and after-hours emergencies, phone 905-761-9485.
Clean Up The Water
With your furnace’s electrical circuit safely shut off, you can wipe or mop up the leakage. This will prevent further damage to your furnace, as well as to your flooring. For a large amount of water, simplify your cleanup by using a wet-dry vac.
Understand The Causes Of Furnace Water Leaks
Are you curious about what might cause a furnace to leak water? The reasons may differ for high-efficiency furnaces (which have AFUE ratings of 90 or higher) and conventional models.
1. High-Efficiency – Condensate Line Is Clogged Or Leaking
The heat exchange process in high-efficiency furnaces creates condensation, changing vapor to water. Your furnace’s condensate line and drain trap normally channel this away. However if a clog or hole develops, the water can end up on the floor around your furnace. You may also find your furnace blowing cold air.
2. High-Efficiency – Condensate Pump Not Functioning
Your condensate pump works to channel liquid through the condensate line and drain trap. If it malfunctions due to mechanical failure, leakage may result.
3. Conventional – Incorrectly Sized Vent Pipe
A conventional furnace (AFUE lower than 90) is equipped with an exhaust vent pipe made of metal (high-efficiency furnaces have PVC vent pipes). The combustion process produces hot gases, which are typically vented outdoors. However, an incorrectly sized exhaust vent pipe may trap these gases. As they cool inside the pipe, they condense, forming the liquid that eventually leaks from your furnace.
4. All Furnaces – Humidifier Leakage
Many Toronto homeowners have a whole-house humidifier added to their HVAC system to remediate the dry air so common during our winters. Humidifiers obviously depend on water to function. Occasionally they might become blocked or leaky, resulting in a puddle on the floor that seems as if it came from your furnace.
When you schedule your annual furnace maintenance and tuneup, be sure to have your whole-house humidifier inspected also.
5. All Furnaces – Check The Air Conditioner
In spring and fall, the weather is so unpredictable you could find yourself alternating between using your furnace and your air conditioning. When you spot what seems like your furnace leaking water, your AC may actually be the culprit. (Don’t worry — we can take care of that, too!)
Get Ready To Turn Your Furnace Back On
Whatever furnace make or model you own, leave it to us. Our expert technicians will diagnose your leak and repair it fast and effectively.
You’ll be ready to have the heat back on ASAP.
But before you do, one last tip: Make sure that you change your furnace filter. Normally it needs replacement every 90 days. But if the filter gets wet from leakage, it will restrict the furnace airflow until you replace it with a new filter.