As summer approaches, it’s important to ensure your air conditioning unit is working effectively and efficiently. While regular maintenance checks are essential, cleaning the AC unit inside your house is just as crucial to maintain its lifespan and prevent any potential health hazards. A clean and well-maintained AC unit can make a significant difference to your home’s air quality, ultimately helping you to breathe easier. But, do you know how to clean your AC unit inside the house? In this article, we’ll provide you with a step-by-step guide to ensure your AC unit is cleaned effectively and safely.

1. Understanding the Importance of a Clean AC Unit Inside the House

How to Clean Your AC Unit Inside the House

Keeping your AC unit clean is essential for the health of your family and the efficiency of the unit. If not cleaned regularly, your AC unit can accumulate dirt, dust, and other pollutants, which can lead to several problems. It can affect the quality of the air inside the house, cause allergies, respiratory infections, and reduce the cooling capacity of the AC unit.

A clean AC unit can also save you money on utility bills because a dirty unit needs to work harder to cool the house. This can lead to more wear and tear on the unit, and eventually, a shorter lifespan. Besides that, a well-maintained AC unit will have a longer life and, therefore, be a more cost-effective investment.

To avoid these problems, it is essential to clean your AC unit regularly. In the following sections, we’ll discuss different ways to clean your AC unit and maintain it to have a comfortable and healthy home.

  • Regular cleaning of your AC Unit is essential for the health and comfort of your family.
  • A dirty AC Unit can lead to allergies, respiratory infections, and reduced cooling capacity.
  • Cleaning your AC unit can save you money on utility bills and make it last longer.

2. Prepare Your AC Unit for Cleaning

Before you start cleaning your AC unit, it’s essential to prepare it properly. First, switch off your AC unit and unplug it from the power source to avoid any electrical shocks. Next, remove the cover or panel to access the internal components of your AC unit.

Once you’ve removed the cover, you should inspect your AC unit for any damage or leaks. Look for broken or corroded parts, frayed wires, or other issues that could cause further damage to your unit. If you notice any significant damage, call a professional AC technician to fix it.

After inspecting your AC unit, the next step is to clear any debris or dust on its exterior. Use a soft-bristled brush or a cloth to clean the surface of your AC unit. Remember to be gentle as the fins and coils of the unit are delicate and can easily bend or break.

Finally, you should cover any nearby furniture or floors with protective material to avoid any water or cleaning solution damage during the cleaning process. You can use plastic sheets, towels, or drop cloths to protect your surroundings.

By taking the time to properly prepare your AC unit, you can ensure that your cleaning process is safe and effective and prevent any accidental damage to your unit.

3. Cleaning the AC Unit’s Air Filters & Coils

How to Clean Your AC Unit Inside Your House

Cleaning the air filters and coils of your AC unit is crucial to maintaining its efficiency and preventing the buildup of debris and dirt that can lead to a breakdown. These filters and coils are responsible for removing impurities from the air and ensuring that cool air is circulated effectively throughout your home.

Step 1: Start by turning off the power to your AC unit and removing the filter. The filter should be located on the air intake vent or near the return air duct. Check the manufacturer’s instructions to determine how to remove the filter.

Step 2: Once you have removed the filter, use a vacuum cleaner or a soft brush to remove dust and debris from the surface of the filter. If the filter is heavily soiled, you may need to wash it with warm water and a mild detergent. Be sure to dry the filter thoroughly before reinserting it back into the unit.

Step 3: Move on to cleaning the coils using a coil cleaner spray. Apply the cleaner directly to the coils and let it sit for the amount of time specified on the can. Rinse the coils thoroughly with water and allow them to dry completely before turning the unit on again.

Step 4: If you notice any bent or damaged fins on the coil, you can use a fin comb to straighten them out. Avoid using too much force and be gentle to prevent further damage. With regular maintenance, your AC unit’s air filters and coils will last longer, and your home will have cleaner air and better temperature regulation.

In the next section, we’ll discuss how to remove dirt and debris from the AC drain line to prevent clogs and water damage.

4. Removing Dirt and Debris from the AC Drain Line

One of the most critical yet overlooked aspects of cleaning an AC unit inside the house is maintaining the drainage system. Over time, air conditioning units can accumulate dirt, debris, algae, and even mould in their drain lines. The accumulation of these materials can cause the drain line to clog, leading to water damage, reduced cooling capacity, and expensive repairs.

To begin cleaning the AC drain line, turn off the power to the unit and locate the access point at the base of the air handler. Next, use a wet/dry vacuum with a long hose attachment to suck out any debris inside the drainpipe. Be sure to vacuum both the drain pan and the pipe to ensure that all debris is removed.

If vacuuming does not remove all the debris, try using a specially designed foam or granular drain cleaner. Follow the manufacturer’s instructions when using the cleaner, and make sure to avoid using harsh chemicals that can damage the unit’s components.

Once all the debris and dirt are removed from the AC drain line, pour a mixture of warm water and bleach or vinegar down the pipe to kill any remaining bacteria or mould. Finally, after 10-15 minutes, flush the pipe with warm water to ensure that no bleach or vinegar remains in the system.

Regular cleaning of the AC drain line can prevent costly repairs and ensure the unit’s optimal performance. Remember to clean the drain line at least once a year and keep an eye out for warning signs such as water leaks or reduced cooling capacity.

5. Sanitizing the AC Unit with Safe & Effective Solutions

After cleaning the air filters, coils, and drain line, it’s time to sanitize your AC unit to ensure it’s free from bacteria, fungi, and viruses. Neglecting this step can lead to respiratory problems and allergic reactions, especially if you or a household member have a weak immune system or suffer from allergies or asthma.

Fortunately, you can sanitize your AC unit using safe and effective solutions that won’t harm the environment or your health. One of the simplest and most affordable options is a vinegar-water solution. Mix equal parts of white vinegar and water in a spray bottle and apply it on the AC coils and fins. Let it sit for a few minutes, then rinse it off with clean water. This solution not only kills germs and mold but also helps remove stubborn stains and odors from your AC unit.

Another way to sanitize your AC unit is by using a disinfectant spray designed specifically for HVAC systems. These products typically contain active ingredients like hydrogen peroxide, citrus extracts, and quaternary ammonium compounds that can kill a wide range of microorganisms. However, make sure you choose a product that’s labeled as safe for indoor use and follow the manufacturer’s instructions carefully. Some disinfectants may require you to wear protective gear or ventilate the room during the application.

One more tip: if you want to add extra protection against germs and allergens, consider installing a UV-C light or an air purifier in your AC unit. These devices can neutralize airborne pathogens and improve indoor air quality, making your home a safer and healthier place to live. Just be sure to choose a product that’s compatible with your AC system and that meets industry standards for safety and effectiveness.

Cleaning your AC unit inside your house is important for maintaining the quality of your indoor air. Do not forget to sanitize it with effective and safe solutions for a healthier living space.

6. Tips for Keeping Your AC Unit Clean & Maintained

Cleaning your AC unit inside the house once or twice a year is not enough to maintain its efficiency. If you want your AC unit to last longer and reduce energy consumption, you need to take good care of it. These are some tips to keep your AC unit clean and maintained.

1. Keep the Area Around the AC Unit Clean

The outdoor unit of the AC system needs enough space to breathe. Remove any debris, plants, and dirt around the unit to avoid blocking the airflow. Also, make sure that there are no objects near the unit that may cause damage when the unit is operating.

2. Change the Air Filters Regularly

The air filters of the AC system trap dust and debris that may affect the air quality and the efficiency of the AC unit. Clean or replace the air filters every one to three months to ensure optimal airflow and prevent the accumulation of dirt and debris inside the unit.

3. Schedule Professional AC Maintenance

Regular maintenance by a professional HVAC technician can help identify any issues with your AC system before they escalate into major problems. Consider scheduling a professional AC maintenance service twice a year to ensure that your unit is working properly and efficiently.

4. Check for Leaks and Blockages in the AC Drain Line

The AC drain line removes the condensation produced by the AC system. If the drain line is blocked or there’s a leak, water may accumulate in the unit and cause damage. Check the drain line regularly and remove any blockages. To avoid further problems, you can pour a mixture of bleach and water through the drain line to kill any mold or algae growth.

5. Set the Thermostat at Optimal Temperatures

Avoid setting the thermostat at extreme temperatures. It may overload the AC system and reduce its efficiency. Keep the thermostat at temperatures that are comfortable for you, but not too cold or too hot.

By following these tips, you can keep your AC unit cleaner and maintained for a longer lifespan.

7. Benefits of Regular AC Unit Cleaning & Maintenance

Regular cleaning and maintenance of your AC unit can bring multiple benefits to your home, family, and budget. Investing time and effort in keeping your AC unit clean and well-maintained will not only ensure its optimal functioning but can also save you from costly repairs and replacements in the long run. Here are the benefits of regular AC unit cleaning and maintenance that you should be aware of:

1. Energy and Cost Savings

Dirty filters, coils, and air ducts can hamper your AC unit’s performance and increase its energy consumption. A clogged air filter, for instance, can restrict airflow and cause your unit to work harder to cool your space. This can lead to higher electricity bills and more wear and tear on your unit. On the other hand, regularly cleaning and replacing your AC filters and coils can help your unit operate more efficiently, saving you money on energy costs and reducing your carbon footprint.

2. Improved Indoor Air Quality

Your AC unit not only cools your home but also helps regulate the air quality by filtering out particles, dust, and allergens. A dirty AC unit, however, can circulate contaminants and bacteria throughout your home, triggering respiratory problems and allergies. Regular cleaning and sanitization of your AC unit can help reduce the risk of these health hazards and ensure the air quality in your home is clean and safe to breathe.

3. Extended AC Unit Lifespan

A well-maintained AC unit can last longer than a neglected one. Regular cleaning, maintenance, and inspection of your unit can help identify and fix issues before they turn into major breakdowns. This can prevent expensive repairs or premature replacement of your entire unit, saving you thousands of dollars over its lifespan. Additionally, keeping your AC unit clean and well-maintained can preserve its warranty and protect your investment.

By understanding the benefits of regular AC unit cleaning and maintenance, you can be motivated to take care of your unit properly and enjoy its efficient and trouble-free operation for years to come.

People Also Ask

1. Is it necessary to clean AC unit inside house?

Yes, it is necessary to clean your AC unit inside the house for maintaining good indoor air quality, preventing mold growth, and improving the efficiency of your AC system.

2. What can happen if you don’t clean your AC unit?

If you don’t clean your AC unit regularly, dust and debris can accumulate on the evaporator coil, air filter, and other parts of the unit leading to poor indoor air quality, reduced cooling efficiency, and increased energy consumption.

3. How often should you clean your AC unit inside the house?

It is best to clean your AC unit inside the house once a year before the start of a cooling season or hire a professional maintenance service to perform the task.

4. Can I clean my AC unit inside the house myself?

Yes, you can clean your AC unit inside the house yourself if you have the necessary tools and knowledge. However, it is recommended to hire a professional to ensure effective cleaning and avoid any damage.

5. What is the best way to clean your AC unit inside the house?

The best way to clean your AC unit inside the house is to turn off the power, remove the air filter, clean the evaporator coil with a soft brush or cloth, and clean the condenser with a hose. Use a commercial coil cleaner for stubborn debris and dirt.


Cleaning your AC unit inside the house is crucial for maintaining proper indoor air quality, increasing energy efficiency, and preventing costly repairs. By implementing routine cleaning and maintenance procedures, you can enjoy a comfortable, cool environment in your home and extend the life of your AC system. If you are unsure about how to clean your AC unit or lack the appropriate tools, it is always best to contact a professional AC maintenance service to avoid any unnecessary issues.