What to Do When You Find Water Underneath Your Furnace

Finding water pooling underneath your furnace can be alarming, especially if you aren't sure where it came from. In many cases, the water is related to your air conditioning system or the condensate pump connected to your furnace.

While some causes may be relatively simple to address, continued leaking can damage your equipment and flooring.

Here's what may be happening and when to call a professional.

Why Is There Water Underneath My Furnace?

Water underneath a furnace is usually caused by one of two issues:

• A malfunctioning or overflowing condensate pump

• A clogged AC coil, drain, or trap

Understanding the source of the water can help determine the right solution.

A Condensate Pump Problem

Your condensate pump removes water produced by your heating and cooling equipment. If the pump cannot drain properly, it may overflow and release water onto the floor beneath the furnace.

A condensate pump can overflow because of:

• An internal clog

• A blockage in the drain tube

• A blockage at the end of the drain tube

• A low spot, or “belly,” in the tubing

• An aging pump that needs to be replaced

If the pump is no longer working correctly, replacing it typically costs between $250 and $350, depending on your location and the specific equipment involved.

A Clogged AC Coil or Trap

Your air conditioning system creates condensation as it removes humidity from the air. That water collects in a pan and should drain away through the AC coil and trap.

If the AC coil or trap becomes clogged, the pan may overflow. The water can then travel down through the furnace and collect on the floor underneath it.

Resolving this type of problem may require clearing the trap or deeply cleaning the AC coil. Because these components can be difficult to access and clean properly, professional service is often the best option.

What Should You Do If You Find Water?

If you notice water underneath your furnace, take a few basic steps:

1. Turn off the equipment if water is actively leaking. This can help limit additional damage.

2. Check for obvious pooling or overflow around the condensate pump.

3. Avoid taking apart the furnace or AC system yourself. Internal components can be difficult to access and may be damaged during an improper repair.

4. Schedule professional service if the water returns or the cause is unclear.

Do not ignore recurring water leaks. Even a small amount of water can damage flooring, electrical components, or the furnace cabinet over time.

Fix It With Fagundes

Water under your furnace should not be ignored. Whether you need a clogged drain cleared, an AC coil cleaned, or a condensate pump replaced, Fagundes Plumbing Heating AC can help protect your equipment and your home from further damage.

Call (978) 350-5522 to schedule professional service.