How To Clean Evaporator Coils On Inside Ac Unit

4 min read 22-11-2024

How To Clean Evaporator Coils On Inside Ac Unit

Dirty evaporator coils significantly reduce your air conditioner's efficiency, leading to higher energy bills and potential breakdowns. Cleaning them yourself can save you money and improve your home's comfort. This guide shows you how to safely and effectively clean the evaporator coils in your indoor AC unit.

Why Clean Your Evaporator Coils?

Evaporator coils are vital components of your air conditioner. They absorb heat from the air inside your home, cooling the air before it's circulated. Dust, dirt, pet dander, and other debris build up on these coils over time. This buildup restricts airflow, forcing your AC unit to work harder.

The result? Reduced cooling capacity, increased energy consumption, and a shorter lifespan for your system. Regular cleaning, ideally once or twice a year, helps maintain peak performance.

Before You Begin: Safety First!

Always prioritize safety when working with any home appliance. Before you start cleaning your evaporator coils, take the following precautions:

Turn off the power: Completely switch off the power to your air conditioner at the breaker box. This prevents accidental electric shock.
Wear protective gear: Use safety glasses to protect your eyes from flying debris and gloves to protect your hands from dirt and cleaning solutions.
Use proper ventilation: Work in a well-ventilated area. Cleaning solutions can release fumes.

Tools and Materials You'll Need

Gather these items before you begin your cleaning project:

Soft-bristled brush (a coil cleaning brush is ideal)
Vacuum cleaner with a brush attachment
Spray bottle
Mild detergent (dish soap works well)
Warm water
Protective eyewear
Gloves
Old towels or rags
Fin comb (optional, but highly recommended for straightening bent fins)

Step-by-Step Guide to Cleaning Evaporator Coils

1. Accessing the Evaporator Coils

Locate your indoor air handler or furnace. The evaporator coil is usually located within this unit. Consult your AC unit's manual for specific instructions on accessing the coils. You may need to remove a panel or access door.

2. Vacuuming the Coils

Carefully use the vacuum cleaner with a brush attachment to remove loose dirt, dust, and debris from the coils. Start at the top and work your way down, ensuring you remove as much loose material as possible. This step significantly improves the effectiveness of the subsequent cleaning.

3. Cleaning the Coils

Prepare your cleaning solution by mixing a small amount of mild detergent with warm water in a spray bottle. Gently spray the solution onto the coils, ensuring that you cover all surfaces. Avoid using harsh chemicals, as they can damage the coils.

Let the solution sit for a few minutes to allow it to loosen any stubborn dirt. Then, use the soft-bristled brush to gently scrub the coils, working from top to bottom. Don't apply excessive pressure, as you might damage the delicate fins.

4. Rinsing the Coils

Once you've scrubbed the coils, carefully rinse them with clean warm water. Again, a gentle spray is recommended. Use a towel or rags to absorb excess water. Make sure to get as much water out of the unit as possible to prevent water damage. Thoroughly dry the coils and the surrounding area.

5. Straightening Bent Fins (Optional)

Inspect the coils for any bent fins. If you find any, carefully straighten them using a fin comb. This will improve airflow and efficiency. Be gentle to avoid further damage.

6. Reassembling and Powering Up

Once everything is dry, carefully reassemble the unit, ensuring all panels and doors are securely fastened. Turn the power back on at the breaker box. Check your AC unit to ensure it's operating correctly.

Maintaining Clean Evaporator Coils

Regular maintenance is key to keeping your evaporator coils clean and your AC system running efficiently. Here's how:

Change your air filter regularly, as per manufacturer's instructions. A clogged filter restricts airflow and forces more dust onto the coils.
Schedule professional AC maintenance annually. A technician can thoroughly clean the coils and perform other essential checks.

When to Call a Professional

While cleaning evaporator coils is a manageable DIY task, there are times when it's best to call a qualified HVAC technician:

Extensive coil damage or corrosion
Frozen coils
Persistent cooling issues after cleaning
Lack of confidence or experience in handling AC units

Cleaning your evaporator coils is a simple yet effective way to improve your air conditioner's performance and extend its lifespan. By following these steps and prioritizing safety, you can keep your home cool and comfortable while saving money on energy bills. Remember to always consult your air conditioner’s manual for specific instructions and to contact a professional if you are unsure about any step of the process.