How to Remove Oil From Evaporator Coil: Efficient Techniques

How to Remove Oil From Evaporator Coil?

To remove oil from an evaporator coil, follow these steps:

1. Power off the AC system at the electric service panel.

2. Remove the screws to open the access door of the indoor unit.

3. Use compressed air to blow out debris.

4. Brush the aluminum fins with a nylon brush, starting from the top and working downward.

5. Vacuum up fallen debris while using compressed air.

6. Spray cleaner on the coils and let it sit for 5 to 10 minutes.

7. Rinse the coils with clean water, being careful not to apply too much water.

8. Leave the access panel open until the coils are fully dry.

9. Reattach all the pieces and turn on the system.

Cleaning HVAC systems with steam is a more sustainable method that doesn’t harm the environment.

Key Points:

  • Power off the AC system at the electric service panel.
  • Remove the screws to open the access door of the indoor unit.
  • Use compressed air to blow out debris.
  • Brush the aluminum fins with a nylon brush, starting from the top and working downward.
  • Vacuum up fallen debris while using compressed air.
  • Spray cleaner on the coils and let it sit for 5 to 10 minutes.

Did You Know?

1. The evaporator coil in your air conditioning unit is typically made of copper because of its excellent heat transfer properties and resistance to corrosion.

2. Did you know that a dirty or clogged evaporator coil can decrease the efficiency of your air conditioner by up to 30%? Regular maintenance, including removing oil buildup, is essential to keep your system running smoothly.

3. One effective way to remove oil from an evaporator coil is by using a specialized coil cleaner. These cleaners contain solvents and detergents that break down and dissolve the oil, allowing it to be rinsed away.

4. As oil can accumulate on the evaporator coil due to a variety of factors, such as a nearby leak or excessive use of oil-based cleaning products, it’s important to check the coil regularly to prevent any potential damage to your air conditioner.

5. When removing oil from the evaporator coil, it is crucial to follow the manufacturer’s instructions and ensure the power to the unit is turned off to avoid any risk of electric shock or damage to the system. Always prioritize safety during maintenance procedures.

Steps For Removing Oil From An Evaporator Coil

Removing oil from an evaporator coil is essential for maintaining the efficiency and effectiveness of your HVAC system. Here are the step-by-step instructions to help you remove oil from the evaporator coil:

  • Firstly, ensure your safety by powering off the AC system at the electric service panel. This step is crucial to prevent any accidents or electrical shocks while working on the evaporator coil.
  • Next, locate and remove the screws that secure the access door of the indoor unit. Open the door carefully to gain access to the evaporator coil.
  • Once the access panel is open, use compressed air to blow out any accumulated debris from the coil. This will help clear away any dirt or dust particles that may have settled on the surface of the coil.
  • Using a nylon brush, gently brush the aluminum fins of the evaporator coil. Start from the top and work your way downward to effectively remove any oil buildup on the coil. Be cautious not to apply excessive pressure that could damage the delicate fins.
  • As you brush the coil, there may be fallen debris on the bottom of the unit. Vacuum up this debris while continuously using compressed air to blow any remaining dirt away.
  • After cleaning the coil and removing the visible oil, spray a coil cleaner onto the coil’s surface. Allow the cleaner to sit for around 5 to 10 minutes, as recommended by the manufacturer. This step helps to dissolve any remaining oil or buildup on the coil.
  • Once the coil cleaner has had sufficient time to work, rinse the coils thoroughly with clean water. Take care not to apply too much water pressure, as it can damage the delicate fins or create unnecessary splashing.
  • After rinsing, leave the access panel open to allow the coils to air dry completely. This will prevent any moisture or residue from accumulating and affecting the performance of the evaporator coil.
  • Finally, reattach all the components, ensuring that the access door is securely fastened. Power the AC system back on at the electric service panel and test to see if it is functioning correctly.
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Powering Off The AC System And Accessing The Indoor Unit

Before beginning the process of removing oil from the evaporator coil, safety should be prioritized and proper procedures should be followed. To ensure safety, start by powering off the AC system at the electric service panel. This will prevent any electrical current from flowing through the system, reducing the risk of accidental electrocution while working on the evaporator coil.

Once the AC system is safely powered off, proceed with accessing the indoor unit. Locate the screws that secure the access door and carefully remove them. Open the access door, taking care to handle it gently to prevent any damage.

Cleaning The Coil Using Compressed Air And A Nylon Brush

After gaining access to the evaporator coil through the opened access door, start the cleaning process.

  1. Use compressed air to blow out any accumulated debris on the coil. This will help dislodge dirt or dust particles that might be obstructing the coil’s surface.
  2. Take a nylon brush and gently brush the aluminum fins of the evaporator coil. Start from the top and work your way downward systematically. This will effectively remove any oil buildup or residue that may have adhered to the coil over time.
  3. Exercise caution and avoid applying excessive pressure that could potentially damage the delicate fins.

Vacuuming Debris And Spraying Cleaner On The Coils

As you brush the evaporator coil, fallen debris may collect on the bottom of the unit. To ensure a thorough cleaning process, use a vacuum cleaner to remove this debris. While continuing to use compressed air, direct the nozzle towards the fallen debris to effectively vacuum it up.

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Once the coil is clean from visible oil and debris, it is time to apply a coil cleaner. Select a suitable coil cleaner recommended for your specific HVAC system and spray it onto the surface of the coil. Allow the cleaner to sit for the recommended amount of time, typically 5 to 10 minutes, as specified by the manufacturer. This step helps to dissolve any remaining oil or buildup on the evaporator coil.

Rinsing The Coils With Clean Water

After the coil cleaner has had sufficient time to work, it is crucial to rinse the coils thoroughly with clean water. This step ensures that any dissolved oil or cleaning solution is removed from the coil, leaving it clean and ready for optimal performance.

When rinsing the coils, it is important not to apply excessive water pressure, as it can cause damage to the delicate fins or result in unnecessary splashing. Use a gentle flow of water and direct it evenly across the surface of the coils.

Ensure that all traces of the cleaning solution have been washed away before proceeding to the next step.

Reattaching Components And Turning The System Back On

Once the coil has been thoroughly cleaned and rinsed, leave the access panel open and allow the coils to air dry completely. This step ensures that any residual moisture or residue is fully evaporated, preventing any potential performance issues.

After the coils have dried, reattach all the components, ensuring that the access door is securely fastened. Double-check to make sure that all the screws are tightened properly. Finally, turn on the AC system at the electric service panel and test it to ensure that it is functioning correctly.

Benefits Of Steam Cleaning For HVAC Systems

Although not directly related to the process of removing oil from the evaporator coil, steam cleaning for HVAC systems offers several benefits that are worth mentioning.

One significant advantage of steam cleaning is its sustainability and environmental friendliness compared to traditional cleaning methods. Steam cleaning uses only water and heat, eliminating the need for chemical cleaners that can potentially harm the environment. Additionally, steam has the ability to penetrate deeply into the HVAC system, effectively removing stubborn dirt, microbes, and odors.

Furthermore, steam cleaning is highly efficient in disinfecting and deodorizing the HVAC system, improving indoor air quality. The high temperature of steam kills bacteria, viruses, and mold spores, ensuring a healthier environment for occupants.

  • Power off the AC system
  • Access the indoor unit
  • Use compressed air and a nylon brush for cleaning
  • Vacuum debris
  • Spray cleaner on the coils
  • Rinse with clean water
  • Reattach components
  • Turn the system back on
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Following these steps will help you maintain your HVAC system and ensure its optimal performance.


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Frequently Asked Questions

What is the correct process to remove oil from evaporator coils?

To remove oil from evaporator coils, the correct process involves using a pressure washer. This aggressive cleaning method is widely recognized as the most thorough and effective for heavily soiled coils. Professional HVAC companies often rely on portable pressure washers to ensure a successful cleaning process. By applying high-pressure water jet to the coils, the pressure washer effectively removes oil, dirt, and other contaminants, restoring optimal efficiency to the evaporator coils. Overall, when it comes to removing oil from evaporator coils, the pressure washer approach is the go-to choice for professionals in the HVAC industry.

How do you clean a greasy evaporator coil?

To effectively clean a greasy evaporator coil, the Nu-Calgon Foam No Rinse Evaporator Coil Cleaner is highly recommended. This exceptional coil cleaner dissolves and eliminates dirt, grease, and oil efficiently and effortlessly. Its self-rinsing formula ensures safety on metal parts, making it an ideal choice for cleaning greasy evaporator coils. Simply apply the cleaner, let it work its magic, and enjoy a thoroughly cleaned coil without the hassle of rinsing.

How do you remove excess oil from AC system?

To remove excess oil from an AC system, several steps can be taken. First, the entire system should be thoroughly flushed, using a suitable solvent and compressed air. This will help to remove any excess oil and contaminants from the system. Next, vacuuming out the remaining oil with a wet-dry vacuum can further aid in the removal process. Another method is to flush the system with rubbing alcohol, as alcohol can effectively dissolve oil deposits. Finally, after the excess oil has been removed, it is important to replenish the system with the appropriate amount of oil to ensure proper functioning.

Why does oil get stuck in evaporator?

Oil can get stuck in the evaporator due to refrigerant migration and the subsequent loss of oil from the compressor’s crankcase. As the oil circulates through the refrigeration system, it can become trapped in the evaporator, leading to an oil-logged evaporator. This can happen when there is an imbalance in the system or if there are issues with the oil return mechanisms, causing the oil to accumulate in the evaporator rather than returning to the compressor. Once the evaporator becomes oil-logged, it can negatively affect the system’s efficiency and performance.

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