Water that comes from HVAC leaks and flooding can cause serious damage to your system. It can get into your pipes, ductwork, furnace or air conditioner. Unchecked water can short your electrical components or can cause harmful corrosion.

Here are some key places throughout your HVAC system to look for signs of water damage, leaks and other water-related issues.

Drain Lines

Water is a natural part of your air conditioning system. As hot, humid air is cooled, it creates condensation on the evaporator coil. The condensation then drips down into the condensate pan, which is emptied outside through a drain line. Sometimes the drain line becomes clogged or damaged, which will cause HVAC leaks. Drain lines should be checked monthly to ensure they are clear and draining properly.

Pumps

Some HVAC systems use a condensate pump to drain off any condensation the system may create. Water accumulated from condensation within the system collects into a reservoir. Once the reservoir fills to a certain point, the pump switches on and pushes the water out through a drain line. Leaks in the pump can cause water to drip and pool in the system, causing damage to its parts. If water cannot drain out due to a clog, a safety relay will be activated and the system will shut down until the water is removed.

Furnaces and Fuel Pipes

Water from floods, hurricanes or other natural disasters can damage your pipes. If your HVAC system runs on a fuel like natural gas, propane or oil, you will need to have the pipes checked for damage. All the supply lines, gauges and valves in and around the furnace will need to be inspected to ensure no water has seeped inside. The water can cause corrosion, which can affect the system's performance and increase the potential for fires or explosions. Water-damaged furnaces and fuel lines will either need to be replaced or cleaned. The Centers for Disease Control (CDC) recommends decontaminating all components of your HVAC system before putting the system back into service.