One common scenario is when the moisture dripping from your AC unit's evaporator coil carries dirt and debris along with it. Over time, this accumulation of dirt and debris can gradually build up within the AC drain line, eventually causing a troublesome clog.
Have you noticed water pooling around your air conditioner? This could be a sign of a clogged drain line, a common issue that can lead to serious problems. A properly working drain line is essential to the overall health and proper function of your AC unit.
If the air filter in your HVAC system is dirty or clogged, it can restrict airflow and cause the evaporator coil to freeze over. When the coil thaws out, your AC will start spitting water. Regular cleaning or replacing your residential HVAC air filter can help prevent this from happening.
The air conditioner is condensing more water outdo the air, and so it is filling up faster.
Another common cause of clogged AC drain lines is excess dust or debris in the AC system. Dirty AC filters and coils can allow dust to get into the drain line. Periodically flushing the drain line with water can help keep the line clean.
To unclog an AC drain line, turn off the power to the unit. Locate the drain line and use a wet/dry vacuum to suck out the clog. Flush the line with water using a garden hose or cup of water. Check and clean the drain pan under the indoor unit.
A clogged condensate drain pipe can make your AC system's drain pan overflow. This is probably the most frequent cause of water leakage from a central AC system, bringing many service calls to HVAC professionals as summer temperatures rise. Drain lines can become clogged with dirt, rust, algae and other debris.
You should shut off your air conditioner immediately if you see any signs of leakage. If there is excessive moisture inside your home, it could cause serious health problems. Mould growth can cause respiratory issues, headaches, nausea, and even asthma attacks. If you see any leaks, call an HVAC technician right away.
Under normal operation, your air conditioner should only leak or produce condensation while operating. Then, the small puddle of water should dry up on a hot day. A telltale sign you could be in need of air conditioner repair is if the water leak persists for a day or more.
If you do get a clog, a pipe cleaner or snake should do the trick. Drain lines are a little more complicated, but suction and vinegar should take care of most clogs. If you don't like the smell of vinegar, you can always try a peroxide solution or even a little bit of dishwashing soap in water.
One of the most obvious signs is a puddle of water in your AC's drain pan, which proves the water isn't draining as it should. Other signs include: Standing water near your air conditioner's condenser unit. A moldy smell around the drain or from your system's vents and registers.
Using Bleach in Your AC Drain
Be sure to use a minimum of 2 cups once or twice per year. Be advised, however, that some newer units no longer recommend bleach or vinegar due to oxidation/degradation concerns. In these cases, boiling water is recommended.
A clogged AC drain pipe is the most common cause of standing water in your AC drain pan. As air passes over the evaporator coils in your air conditioner, it cools down and loses some of its humidity. This humidity is left behind in the form of condensation on the coils.
The unit is designed to collect the moisture from the air in the room. If the room has a high humidity level, the unit will work harder to cool the air thus collecting more water.
As soon as you notice that your air conditioner is leaking, go ahead and turn it off. This is important even if the air in your home doesn't feel any different, because it will stop the flow of water. The more water leaks out of your air conditioner, the more susceptible it becomes to further damage.
Over time, this line can become clogged with algae, dirt, dust, and debris. When this happens, the line backs up and overflows from the drain pan, causing the water to leak into your home. You can unclog the drain line by removing the debris with a wet/dry vac.
AC drain lines clog due to a backup of debris as well, but it's not usually food particles or kid's toys. Leaves and other yard debris can block the drain line. Another contributor to clogs is condensation. Condensation occurs primarily because the evaporator coil stays wet as it wrings moisture out of incoming air.
It's completely normal for your AC to drain 5-20 gallons of water outside of your home (via the condensate drain). It's NOT normal for your AC to drain any amount of water inside your home (around your indoor AC unit).
The repair cost to have the drain line flushed runs between $75 to $250.