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.
It will kill any bacteria or mold present in your drain line, just like vinegar will. Pour one cup of bleach down your drain line every month to help keep it free from clogs. One cup of bleach is the cheapest and easiest way to unclog the drain line in your AC.
Pour Vinegar or Cleaner: - If the vacuum method doesn't work, pour a cup of vinegar or a specialized A/C drain line cleaner into the drain line. - If using vinegar, let it sit for about 30 minutes to help dissolve any buildup. Flush with Water: - After the vinegar has sat, flush the line with water.
Locate the white plastic pipe that leads outside, then check for any blockages like debris or ice. Defrost ice with warm water, not boiling, and use a rod or wire to push through the obstruction. If that doesn't work, call a pro with specialist equipment.
All right, so in summary, don't use bleach; use vinegar. That helps with any mildew growth—keeps you running clean. It's not going to actually clean your A/C drain, but it can prevent some backups.
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.
Flush Condensate Drain Line
The repair cost to have the drain line flushed runs between $75 to $250.
AutoZone carries an AC flush tool in their Loan-A-Tool program, part number 57377. This tool allows you to fill AC flush solution into the bottle, and then use compressed air to blast this solution through the AC components, flushing any debris out.
Water and Dish Soap
Dish soap and water, of course! Use a mixture of both to clean your AC drain line. The dish soap will help to break down the dirt and debris, while the water will flush it away.
Symptoms of a clogged air conditioner drain line
Water damage near the indoor unit, including rust on the bottom of the unit. Musty smell when the AC is running. Heat pump/AC not cooling house. Heat pump/AC not turning on.
Over time, debris, mold, and algae can build up in these lines, causing clogs and potential damage to your AC unit. The good news is that you can easily tackle this task using a simple and eco-friendly solution: vinegar.
All you have to do is pour 1 cup or baking soda down your drain and then follow it with 1 cup of vinegar. After your mixture is in the drain, seal the top of the drain and wait for about an hour so your concoction can start breaking down any clogs. After about an hour, rinse your drain a few times with boiling water.
Debris Buildup: Dirt, dust, and other debris can accumulate in the AC drain line, reducing its capacity. Insect Infestation: Insects, such as ants or spiders, can build nests in the AC drain line, restricting water flow. Root Intrusion: In some cases, tree roots can penetrate the AC drain line and cause blockages.
If you have a very stubborn clog that doesn't come out with a shop vac and water, then you can try using a drain snake. Push the drain snake down into the drain line access near the air handler. Make sure the that the drain snake does not go towards your air handler or you could potentially damage the evaporator coil.
Many HVAC professionals suggest that you avoid using harsh chemicals such as Drano to unclog the block.
Cleaning AC Drain Line
We recommend using vinegar instead of a bleach solution because bleach can cause corrosion if you have copper tubing in your AC's drain line. In addition, spilling bleach can ruin your carpet or clothing, whereas vinegar does not harm; it just leaves an odor.
Call Service Champions for Emergency AC Repair
We provide residential AC repair in San Jose, Sacramento, and other parts of Northern California. Call 833-600-0991 or schedule your visit online whether you need a condensate drain line unclogged, an AC thermostat repair, or an air conditioner replaced.
The dehumidification process happens within the air handler (your AC's indoor unit). Air blows across the evaporator coil, where moisture condenses and drips into a drain pan. From there, the moisture travels outside your home via a pipe called a drain line.
If the drain line is clogged, your AC won't be able to cool your home effectively. Ineffective cooling increases humidity levels, and you'll experience warmer temperatures. There's water pooling around your indoor AC unit. As warm air passes over your AC's evaporator coils, condensation naturally occurs.
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.
If the blockage is due to freezing, the pipe needs to be carefully thawed using warm water. The water should be gently poured over the external section of the pipe until it defrosts. The use of boiling water should be avoided to prevent damage.