What’s Causing the Central AC to Flood (And What to Do About It)
To prevent water leakage due to ice accumulation on AC coils during constant use in summer or when running in temperatures below 60°F, turn off the air conditioner for an hour or two to thaw the coils.
A central AC unit can leak for several reasons. While some issues are easily addressed, others require more intense intervention. Air conditioners normally emit a certain amount of water because the unit cools the home by removing moisture from the air. The condensation builds up on the AC coils and then drains outside of the home. A small amount of water dripping from a drain hole or pipe is normal operation for the unit, particularly on a warm or humid day. However, if water is flooding onto the floor or a nearby wall, this issue must be dealt with right away as it may be a result of the following.
A clogged condensation drain
The condensation pan collects water that the AC unit extracts from the air. When everything is working properly, the condensation drains through the drain pipe to the outside of the home. If this drain becomes clogged, water builds up inside and overflows the condensation pan.
One of the most common causes of a leaky AC unit is a clogged condensation drain. Check the condensation pan to see if water is flowing over the edge of the pan. If so, the drain hole has likely become clogged. Algae and other particulates can clog the condensation drain, causing the water to build up and ultimately overflow the drain pan.
This is generally a problem that homeowners can fix themselves. Flush the drain pipe out with clean water, or use a shop vacuum to blow the clog out of the drain. Clean up any standing water, and then allow the AC unit to run for a day or so. If the water remains contained within the drain pan, the flooding problem is solved.
Frozen coils
During the summer season when the AC unit runs constantly or when the unit is running while the outside temperature dips below 60 degrees, ice can accumulate on the coils inside the AC unit, causing the unit to leak water. This problem can be solved by turning the air conditioner completely off for an hour or two to allow the coils to thaw.
Improper installation
When an HVAC unit is installed, the installers pitch the unit toward the outside of the home to ensure condensation flows to the drain pan. If the central air unit was not installed properly, the unit may leak water. For this problem, consultation with an HVAC professional is necessary to get the unit correctly installed.
Other issues
If water is leaking from parts other than the drain or condensation pan, it is advisable to call an HVAC technician right away. The AC unit is designed to accommodate draining water with the condensation system, but something is likely wrong if water is leaking from other areas. This problem needs professional attention.
Artic Energy is a professional heating and cooling service in Houston, TX. We provide HVAC installation, air purifier installations, filter replacement and maintenance services, repair maintenance, energy-efficient solutions and seamless installations.
