What can I spray on my AC coils to clean them?

Author: Lilyan Hayes  |  Last update: Thursday, December 28, 2023

While there are a number of commercially available coil cleaning solutions on the market, air conditioner coils can be cleaned with a solution of a mild household detergent and water. The detergent and water mix is applied to the coil using a low-pressure sprayer.

Can you spray vinegar on AC coils?

Yes, vinegar mixed with water is often used to clean AC coils at home. However, vinegar is usually effective only against lighter dirt build-ups. Nevertheless, you can keep your coils in good shape by mixing white vinegar and water in a spray bottle and spraying the mixture onto the coils.

Can you use Dawn dish soap on AC coils?

Warm Water and Detergent

Any standard dish soap, mixed with warm water should do the trick on really grimy coils.

Can you use WD 40 to clean AC coils?

Do NOT use WD-40 or other all-purpose lubricants. 5. Spray the inside of the empty air conditioner unit with moderate pressure from a water hose.

Can you spray Lysol on AC coils?

Lysol has a high ethanol alcohol concentration, which means it is highly flammable. When you spray this disinfectant into your HVAC system, it could come into contact with the electric motor and create a flash explosion that could damage your home's ductwork and even create a fire.

How To Clean Your AC and Coils Like the Pros Do | WILL Make Air Blow Colder

Can you use hydrogen peroxide on AC coils?

Spray down the interior cabinet and exterior housing with hydrogen peroxide, and use a cloth or rag to wipe down everything that you can reach. You can use the same spray cleaning solution on the evaporator and condenser coils, or you can use an AC coil spray cleaner.

What kills mold on AC coils?

Spray alkaline coil cleaner over the fins and coils. Be sure to read the manufacturers instructions on how to do this safely. Let the cleaner set and drip for the time specified in the manufacturer's directions. Spray off the cleaner with water in a spray bottle.

What kills black mold in AC unit?

To clean mold and AC, unlock and remove the filter. If it's disposable, replace it. If it's reusable, wash it in a mix of one-part bleach to 10-parts water. Allow it to soak for at least 10 minutes to kill any mold.

What is the black stuff on my AC coil?

Mold grows best in areas that are constantly damp and well-shielded from direct sunlight. So it's no surprise to find mold growing on the evaporator coil. Enclosed within the air conditioner plenum, the evaporator coil is kept damp and in the dark — the perfect conditions for mold to flourish.

What kills black mold in air conditioner?

You can use diluted bleach or distilled white vinegar, or you can buy an Environmental Protection Agency-registered mold removal solution from your local hardware store. Aim for a 1:3 ratio of cleaning solution and warm water. Take apart the AC unit: Use a screwdriver to remove the grille from the front of the unit.

Do AC coils need to dry after cleaning?

Be careful to not apply too much water since too much moisture can damage the coils. After you have finished cleaning, make sure to leave the access panel open until the evaporator coils are fully dry.

How do you make homemade AC coil cleaner?

To create the homemade cleaner, add ½ cup of white vinegar, a few drops of Dawn, and fill a spray bottle with water. Spray down the coils with the homemade or commercial cleaner. Let the cleaner sit for 5-10 minutes. For excessively dirty coils, run a sponge down the coils.

What kind of acid is used to clean AC coils?

Cal-Brite® is a low-pH or acid-based product developed for cleaning evaporator coils, air-cooled condensers and other finned cooling and heating coils. It is based upon glycolic acid and ammonium bifluoride.

How do you clean AC coils without chemicals?

As AC coils are typically made from copper or aluminum, they can be cleaned with water. Rinse the coils on any outdoor central AC unit by spraying with water from your garden hose on a low setting.

How long should I wait to turn my AC on after cleaning coils?

Once you have cleaned your evaporator coils, you may need to allow your system to dry before turning the AC back on. Leave the access panel off and wait 30 to 60 minutes before turning the system back on.

Will dirty AC coils affect cooling?

Performance decreases significantly when your AC coils are dirty. Your unit can no longer cool air efficiently with a layer of dirt buildup on the indoor coil. Refrigerant may take longer to evaporate, resulting in higher indoor temperatures or, in extreme cases, your unit overheating.

How long should I let my coil dry after washing it?

Run the coil under hot water for a few seconds. This will help lift some outer layers of residue from the wicking material and coil surface. Place the coil in a container and submerge it in boiling water for approximately 30 minutes. Allow the coil to completely dry for 24 hours.

Is it safe to run AC with black mold?

If you have it in your air conditioner, it won't be long until it reaches your home's air ducts. Black mold can be toxic to those around it, so it is vital to remove it as soon as possible. Luckily, Davis Home Services has the tools and experienced professionals needed for the job.

Can black mold in AC make you sick?

If you have mold allergies, black mold can make you sick. Black mold produces spores, which can enter the air. Molds also produce microbial volatile organic compounds (mVOCs), which create an unpleasant “moldy” or musty smell. If you have allergies, you can have allergy symptoms from the spores or mVOCs.

How do I keep my air conditioner mold free?

How to Prevent Mold in HVAC Systems
  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.

How do I know if my AC coil is dirty?

Here Are Five Telltale Signs That Your AC Coils Are Dirty And Need to be Cleaned
  1. Your electricity bill has been going up. ...
  2. Your unit seems to be running longer for no reason. ...
  3. Your home doesn't feel as cool as it should be. ...
  4. The Coil is Covered in Frost While Running. ...
  5. Higher Indoor Humidity.

What is the difference between a clean and dirty AC coil?

There is no comparison between dirty coils and clean when it comes to system efficiency. Clean coils allow your system to function at its fullest capacity and efficiency. Dirty coils allow bacteria to breed and affect your air quality, they also prevent proper air flow which increases your energy expenses.

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