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Why is my Furnace Leaking Water?

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  • Why is my Furnace Leaking Water?

25 JAN

Why is my Furnace Leaking Water?

There are many reasons why a furnace might be leaking water. Newer furnaces will naturally produce water. However, if it seems like an unusual amount, it might be good to investigate further. Water can damage a home and cause significant problems, so we compiled a list of why a furnace may leak.

High efficient furnaces with AFUE ratings over 90 usually come with a cool exhaust which will cause condensation inside the furnace. A by-product of burning natural gas is condensation - which is typically run out a PVC pipe from the furnace into a floor drain. However, if the drain or pipe becomes clogged, water could back up and leak everywhere. Standard efficient furnaces older than 15 years should not be leaking water. If yours is, read below for other potential issues that may be occurring.

Broken Condensation Line
Some furnaces naturally produce condensation which is expelled through a drainage line. If this line is cracked or broken, you may experience a leak.

Faulty Secondary Heat Exchanger
High efficient furnaces have a secondary heat exchanger. Failure in this exchanger can be a possible cause of water leakage.

Furnace Humidifier
If your furnace has a humidifier attachment, check it for cracks or leaks. Sometimes a crack can occur right at the humidifier unit itself - which can potentially backup into your furnace. Regular seasonal maintenance is a good way to stay on top of this potential issue.

Coil Leak
If your furnace is attached to central air, there will be a coil located right above the furnace. This unit sucks heat out of your home which cools the air. A clogged filter can reduce airflow and cause the coil to freeze up - which will then pool with water and cause it to leak inside your furnace. Be sure to keep a clean furnace filter to prevent this issue from taking place.

If you notice an unusually large amount of water (or more than normal) coming form your furnace, take action as soon as possible. Turn off the furnace, clean up the water and call for service. 4 Seasons Heating, Cooling & Electrical are experts at identifying the root cause of furnace leakage. If your furnace is leaking, call us 24/7 to schedule a service call.

Tag: Heating