Keeping your air conditioning unit clean is essential for maintaining peak performance and reducing energy costs. If your AC isn’t running as cold as it used to, it’s often due to clogged or dirty coils. Dirty coils reduce efficiency, forcing your AC to work harder and ultimately costing you more on electricity during the hot summer months. Cleaning your AC coils regularly can save you money and extend the lifespan of your system. Here’s a complete guide on the best way to clean your AC unit and coils safely and effectively.
What You’ll Need
Turn Off the Power Before Cleaning
Safety should always come first when working with an AC unit. Before starting any cleaning, make sure the power to your machine is completely turned off. Most AC units have a breaker box nearby, usually attached to the unit itself. Flip the breaker to the “off” position and double-check that no power is running to the machine. It’s a good idea to close the breaker box door to prevent water from entering during cleaning.
If the breaker is in a position where it might get splashed during cleaning, remove it and set it aside in a safe location. You can place it in your garage or pocket to ensure it stays dry. This step may seem simple, but it’s crucial for your safety and for preventing any damage to the electrical components of your AC unit.
Remove the AC Unit Top Carefully
Next, remove the top cover of your AC unit to access the coils. The method for doing this can vary depending on your model, so it’s wise to check your unit’s manual or do a quick online search if you’re unsure. Generally, there are screws around the top that need to be removed. Be cautious while handling the cover because wires and fan blades are often attached.
Avoid pinching any wires or bending the fan blades, as this can create noise and reduce efficiency once the unit is running again. If the top is heavy or awkward to hold, ask a partner to assist or find a way to balance it safely during cleaning. The goal is to prevent damage while giving yourself full access to the interior of the unit.
Remove Debris Before Applying Cleaner
Before applying any cleaning solution, use a shop vac to remove loose debris inside the AC unit. Leaves, bark, dust, and other materials often accumulate in and around the coils, and removing these first will make the cleaning process much more effective. Be gentle while vacuuming to avoid bending the delicate fins on the coils, as even minor damage can reduce the unit’s efficiency.
While inspecting the interior, check the drain holes to ensure they aren’t clogged. Clearing these will allow water to flow out properly, preventing buildup and future problems. Removing debris first ensures that your cleaning solution can reach and work on the actual coils rather than just sitting on top of leftover dirt.
Apply a Foaming AC Coil Cleaner
Now it’s time to clean the coils themselves. A foaming cleaner specifically designed for AC units works best because it adheres to the fins and coils, breaking down built-up grime. Start spraying from the bottom and work your way up, paying extra attention to areas with heavy buildup. Foam cleaners stick to the surface, giving them time to dissolve dirt and grime effectively.
Make sure to follow the manufacturer’s instructions for dwell time: usually 10 to 15 minutes so the cleaner has enough time to work. For dual-wall coil units, consider spraying both the outside and inside of the coils to ensure a thorough clean. Using a cleaner with a good nozzle will help penetrate all the small grooves in the coils for the best results.
Rinse Gently to Avoid Damage
After the cleaning solution has had time to work, rinse the coils carefully. Avoid using high-pressure water or pressure washers, as they can bend the fins and damage the unit. A garden hose on a gentle spray or shower setting is ideal. Spray from the inside toward the outside to push debris out rather than further into the unit.
Take your time during this process. The goal is to remove soap and debris without causing any harm to the delicate components. While some cleaners are labeled “no-rinse,” a thorough rinse helps prevent any sticky residue that could attract dirt and make future cleaning harder. Wearing waterproof shoes during this step is also recommended, as rinsing can get messy.
Reassemble the Unit and Restore Power
Once the coils are clean and rinsed, carefully replace the top cover of the AC unit. Make sure all wires are properly positioned and not pinched under the cover. Line up the screws and secure the top back in place. Reinstall the breaker, turn the power back on, and your AC unit is ready to run efficiently again.
This process generally takes around 35 to 45 minutes depending on the level of dirt and debris. For optimal performance, clean your AC coils at least once a year. Homes in dusty areas or regions where the AC runs constantly may benefit from more frequent cleaning. Keeping your coils clean helps your AC operate at peak efficiency, saving energy and money.
