The reason you shouldn’t use bleach or vinegar to clean your AC drain line all boils down to the fact that these chemicals are corrosive to metals. In other words, they literally eat away at metal.

How often should you pour bleach in your AC?

Using Bleach in Your AC Drain Be sure to use a minimum of 2 cups once or twice per year. Be advised, however, some newer units no longer recommend bleach or vinegar due to oxidation/degradation concerns.

Can you spray bleach in an air conditioner?

You can use bleach as an excellent choice to clean a window air conditioner since it destroys mold. Unfortunately, it will also destroy metal and some parts of your AC.

Is bleach or vinegar better for AC drain line?

We recommend using vinegar instead of a bleach solution because bleach can be harmful to your AC system if your drain line has copper tubing. Using vinegar will not damage your system. Spilling bleach can also ruin carpet or clothing, whereas vinegar will just leave a strong odor.

Does bleach harm evaporator coils?

Evaporator coils are normally made out of copper or aluminum. So what happens if a corrosive chemical such as bleach or vinegar comes into contact with your evaporator coil? It’s going to corrode! Using bleach or vinegar can be especially risky if you think your AC drain line is clogged.

How do I keep my AC drain lines clear?

Flush the Drain Line Regularly Keep your drain line clean by flushing it with vinegar solution every three months. You can also use warm water. Refrain from using bleach, however, as they can damage the PVC plastic pipes, as well as break down the cement joining the fittings together.

Can bleach damage PVC pipes?

You can put small amounts of bleach down PVC pipes, but it probably won’t break up clogs very well. Larger amounts can be dangerous. The bleach can also combine with substances trapped in the pipes and cause a reaction.

What can I pour down my air conditioner drain?

You do that by pouring a 1/4 cup of distilled vinegar through the AC condensate drain line. We recommend distilled vinegar because its acidity clears the clog faster. You may also use hot water, dish soap, or peroxide if you cannot stand the smell of vinegar.

How do I keep my AC drain line clean?

By pouring a ¼ cup of vinegar into your AC’s drain line, you will kill any mold, algae, mildew, and other forms of bacteria or fungi, preventing it from forming a buildup and causing a clog. Repeat this monthly for the best results.

How do I get rid of black mold in my AC vents?

Combine 1 cup of bleach with 1 gallon of water. Wipe the blades, duct opening and the inside of the vent with a long, flexible mop soaked in the bleach solution. Allow the inside of the vent to dry thoroughly before reattaching the vent cover. Black mold can grow in any remaining moisture.

Article first time published on

How do you deodorize an air conditioner?

1. Turn the power to the unit off. …
2. Change the air filter(s). …
3. Clean the evaporator coils. …
4. Clean the condensate line.

How do I prevent mold in my air conditioner?

1. Maintain the drain pans. …
2. Replace air filters regularly. …
3. Apply an HVAC mold inhibitor. …
4. Use a disinfectant. …
5. Keep ducts dry. …
6. Check the air intakes.

Is the black stuff in my AC mold?

If you’ve noticed black stuff coming out of your AC vents, it’s most likely either: Soot from candles or your fireplace (the most likely culprit) Mold spores. Dark dust or dirty insulation.

How much bleach do you put in an AC drain?

Mix 1/4 cup bleach with 1 cup hot water and pour it into the pipe that leads into the condensate drain pan. PVC pipe and pans are not affected by the corrosive nature of chlorine bleach, but be careful to not splash the bleach onto the evaporator coils or other metal parts of the air conditioner.

Can I put bleach in my condensate pump?

Put a funnel in the “T” and pour a quart or two of bleach into the drain. Go slowly as to allow the bleach to kill the mold and mildew . This should be done once a year at least. … If you have a condensate pump, the bleach will fill up the water reservoir and turn on the pump cleaning out the vinyl exit tubing.

Should you pour bleach down your toilet?

Bleach is a powerful, toxic substance that should be used carefully and properly, and pouring it down a drain is not a proper use. Bleach can react with other substances in your pipes, potentially release fumes, and further plug up the system. … Pouring bleach down them will do much more harm than good.

Can you pour bleach down a smelly drain?

To use bleach to kill odor-causing bacteria, first, fill your sink with hot water. Then, add about one cup of regular household bleach to the sink. After you’ve added the bleach, allow the sink to drain. Repeat the process until the drain smells more like bleach than anything else.

Does bleach unclog drains?

Although you can use 1/5 to 3/4 of a cup of bleach to clean and deodorize drains, followed by a good flushing of hot water, it will not clear a clog. Bleach is amazing at sanitizing and killing germs, but it won’t eat through hair and soap scum that’s trapped in the pipes and causing a clog.

How do you tell if your AC drain is clogged?

1. Musty, moldy smell near your indoor unit or in air from the registers/vents.
2. Standing water near the indoor unit.
3. Water damage in areas near the indoor unit.
4. AC system is not cooling your home.
5. AC system shuts down or doesn’t turn on.

Why does my AC drain keeps clogging?

Why Is My AC Pipe Clogged? An AC pipe usually develops a clog due to algae. Because of warm air that blows over the cold evaporator coil of the HVAC, the drain pipe can get pretty humid; and along with the condensate traveling through the pipe, these conditions are perfect for algae to thrive.

What causes AC drain lines to clog?

According to experts, clogging occurs when the moisture that drips off your evaporator coil carries dirt, small debris and other airborne particles into the condensate drain. The dirt and airborne particles will eventually build up and cause a clog.

Will vinegar hurt PVC pipes?

The answer is that vinegar will not harm your pipes if used in small doses as recommended in many of the recipes that you find online. No matter what your pipes are made of, pex, pvc, copper, etc. Vinegar will not harm your water pipes.

Can I spray Lysol in my window air conditioner?

For window units Knowing how to clean an air conditioner that sits in the window is just as money-saving as cleaning your own central air system. Apply Lysol® All-Purpose Cleaner to the coils on the back of the unit and scrub with a stiff brush.

Can mold build up in air conditioner?

A: Mold does have a tendency to grow inside air conditioners that sit unused for a while. … While odds are the mold in your AC unit is not the scary black mold (Stachybotrys chartarum) that you’ve heard about, inhaling mold spores of any type can result in respiratory disorders.

Can mold in AC unit make you sick?

Mold can grow virtually anywhere in your home, and regardless of location, exposure can lead to health problems. However, mold located in air conditioning units spreads spores out into the air throughout the house, which makes it especially dangerous and especially likely to cause sickness.

Why does AC smell like pee?

If your air conditioner smells like urine or pee, you could be dealing with a few different problems. The main ones culprits are mold again, or a coolant leak. Some people describe the scent as more like ammonia.

Why does my AC unit smell like mildew?

In short, a musty smell indicates bacterial growth build-up, which forms on the drain, evaporator coil, or in the drip pan or drain line of your AC. Your evaporator coil is a dark and humid location, so all sorts of mold and mildew can grow, which causes that unpleasant, musty smell.

Why does my AC smell when it turns on?

Dust, hair, and moisture on the AC filter encourage mildew growth, which can cause a musty odor when the air conditioner runs. This is a likely reason why the air conditioner smells when first turned on if you don’t use forced-air heating in winter. To help prevent this odor, clean or replace the filter in the spring.

Can a window AC unit get black mold?

Even if you invest in the best window air conditioner, the unit can develop mold if it’s unused for an extended period of time. … You likely wouldn’t notice the air conditioner’s black mold problem until you turn the unit on in the warmer months and a mildew odor fills the room.

How do you clean mold out of a window air conditioner without removing it?

To clean the window air conditioner without removing it, use the vacuum with the soft brush attachment, and carefully vacuum out any dust balls or other stuff you see in the unit. Then, mix together your water and two drops of dish detergent. Next, spray this inside the machine and wipe the areas down.

What does toxic black mold look like?

Stachybotrys chartarum typically appears black or extremely dark gray in color. This mold tends to have very round splotches with a speckled appearance. Black mold thrives in moist areas, so keep an eye on your kitchen, bathroom and basement. …