Does your air conditioning system have a rusted condensate pan? If so, you might be wondering whether it’s a concern. Rust consists of iron oxide. It’s the result of a chemical reaction between oxygen – typically oxygen in water – and iron. When iron is exposed to oxygen, it may turn into rust. So, should you be worried about a rusted condensate pan?

Overview of the Condensate Pan

The condensate pan is a small, shallow pan that’s designed to collect the condensation produced by the evaporator coil. Also known as the drip pan, it plays an important role in dehumidification.

Airborne moisture vapor will condense on the evaporator coil when your air conditioning system is running. As it collects, the moisture vapor will form droplets that drip into the condensate pan below. From there, the water will drain through a pipe leading to your home’s exterior.

Rust Can Cause Water to Leak Out of the Condensate Pan

Rust is more than just an aesthetic issue; it can cause water to leak out of the condensate pan.

Over time, rust can eat through metal objects, including condensate pans. Once your condensate pan has been breached, it may no longer contain the water from the evaporator coil. Some of the water may leak out of the rusted holes or cracks. Depending on where your condensate pan and evaporator coil are located, this may lead to structural damage.

If your condensate pan and evaporator coil are located in the attic, the leaking water may damage your ceilings. If they are located in the basement, the leaking water may damage the foundation or surrounding walls.

In addition to structural damage, the leaking water will raise your home’s humidity levels. Your air conditioning system can only dehumidify your home if the water drains out of the condensate pan through the pipe. If it leaks out of the rusted hole or crack, your home will become more humid. The water will evaporate back into your home’s living space, thus raising your home’s humidity levels.

How to Fix a Rusted Condensate Pan

To protect your home from water damage, you should replace your condensate pan if it’s rusted. Condensate pans are relatively cheap. You can contact a heating, ventilation and cooling (HVAC) technician to purchase a new condensate pan. The HVAC technician can even install it so that you have peace of mind knowing it’s set up correctly.