How to Clean a Coil on an Air Conditioner
Air conditioner coils are some of the most vital parts of your unit's operating system. And because these parts are so delicate, it’s important to make sure the cleaning job is done right to avoid damage. While we recommend hiring a professional, you can clean a coil on an air conditioner on your own. Learn how to clean a condenser coil below.
How to Locate the AC Coil
Typically, the only coil you need to worry about is the outdoor condenser coil.
- The outdoor condenser coil can be found wrapped around the interior components or along the side wall. You’ll find it either well-exposed, protected by a wire coil guard or guarded by a protective metal outer panel.
Air Conditioner Coil Cleaning Methods
There are a variety of ways to clean an AC coil. You can use compressed air, detergent and commercial cleaners. Learn how to properly clean a coil on an air conditioner with each product below:
How to Clean AC Coils with Compressed Air
Note that this method is specifically for the outdoor coil. Use the compressed air to effectively remove surface dust, debris and dirt from the coil. Make sure you blow the air straight and not at an angle, as this can bend the fins. To remove heavier buildup, use a detergent or coil cleaning solution recommended for your unit.
How to Clean AC Coils with Household Detergent
If you don’t want to buy a commercial coil cleaning solution, the job can be done with a mild household detergent and water mixture. Just make sure the detergent isn’t highly acidic so you don’t damage the copper and alloy metals. Use a low-pressure sprayer to apply the mixture, then gently rinse it off.
How to Clean AC Coils with Commercial Cleaners
When using a commercial cleaner on your AC coils, you want to make sure you choose a foaming cleaner for the outdoor condenser coil and a self-rinsing cleaner for the indoor coil. Before you use the cleaner, clear any debris with a special fin brush or by hand. Then apply the cleaner and rinse the coil.
Why is Cleaning AC Coils Important?
When the unit is used regularly, the surface moisture and debris can build up. Over time, leaving the buildup can cause less effective heat transfer, meaning the hot air won’t be pushed out to cool down your home or office. Here are just a few issues dirty coils can cause:
- Decreased cooling
- Increased cooling costs
- Increased unit wear
- Increased operating temperatures
- Reduced comfort
- Frequent system repairs
How to Clean a Central Air Conditioner
- Step 1. Power down the unit.
- Step 2. Clear away any debris and cut back any foliage from around the unit.
- Step 3. Remove the top panel.
- Step 4. Use a vacuum to clean up any debris sitting in the bottom of the unit’s interior.
- Step 5. Using a hose, carefully rinse the condenser coils, spraying away from any internal components, in a side-to-side motion from top to bottom.
- Step 6. Check that the coil is clear of blockages by shining a light through it.
- Step 7. Reinstall the top panel.
- Step 8. Reconnect and power up the unit.