A condenser coil is a crucial component of an air conditioner that requires regular cleaning. Let’s explore how to do that safely and effectively.
What Is a Condenser Coil?
An AC condenser coil is located outdoors and comprises copper tubing and aluminum fins. The system compresses the heat-filled refrigerant into the coil and draws air over the tubing and fins. That causes an exchange of heat energy between the coil and the ambient air.
Why Condenser Coil Cleaning Is Worthwhile
A condenser coil will accumulate dirt and other grime over time. That buildup serves as an insulator, making the exchange of heat energy described above less efficient. A dirty coil increases energy consumption and system cycling, thereby causing more wear and tear.
The Importance of Professional Condenser Coil Cleaning
Cleaning a condenser coil may seem relatively simple, but it’s usually best left to the professionals. Cleaning a coil can expose you to the risk of electrical shock and serious lacerations. There’s also much more to good AC maintenance than just cleaning the coil.
Seasonal AC Tune-Ups
The industry recommendation is to schedule an annual AC tune-up in the spring. That service will include a multipoint inspection and comprehensive cleaning, including both the condenser and evaporator coil. Most HVAC warranties require it. Regular maintenance prevents AC repairs and extends the life of the system.
The Tools & Supplies You’ll Need
- Gloves
- Fin comb
- Flashlight
- Coil cleaner
- Metal brush
- Screwdriver
- Shop vacuum
- Hose and sprayer
The coil cleaner and fin comb are items that the average homeowner won’t have in their tool shed. Ideally, you should have an electric screwdriver and a headlamp. Also, a shop vacuum with a wand attachment is preferable for easier access.
Safety Precautions
An AC is an electric system. There’s enough electricity running through the outdoor unit to seriously injure you. By code, most AC systems have an outdoor disconnect switch. Remove that switch to disable the system. Don’t replace it until the system is dry.
How to Clean a Condenser Coil
Maintain a 1- to 3-foot perimeter around your outdoor unit. This area should be free of grass, overhanging branches, bushes, and so on. This is a good time for any necessary upkeep to make coil cleaning easier and ensure efficient operation during the summer ahead.
Gather all your supplies, including a canned coil cleaner appropriate for your system. While a DIY coil cleaner is an option, the risk of damage isn’t worth the minimal savings. Ensure you have powered down your AC completely. Then, remove the metal housing around the coil. That usually involves eight or more screws and removing a top and side panel.
Optionally, you can remove the fan for easier access. A technician would do this during a professional tune-up in order to clean, lubricate, and balance the fan.
Once everything is out of the way, clear the housing of any debris. Over the years, the cage can trap leaves, branches, and other items. You can sweep this clutter out or clear it even more quickly with a blower. Once you’ve cleared the larger debris, use your shop vacuum. Doing a good job here will help avoid airborne particles as you work.
Some of the aluminum fins around your condenser coil can bend over time. Use the fin comb gently to straighten them out. Doing so will improve airflow and thus efficiency. Don’t use a screwdriver or other tool because it’s easy to bend the fins severely and worsen performance.
Set your sprayer to a wide setting to avoid high pressure. Spray the condenser coil gently to wet it down completely. Next, follow the precise instructions for your coil cleaner. Generally, you should shake the coil vigorously and then cover it fully with a thick lather. You’ll then need to let the foam sit, usually for 5 to 10 minutes.
After waiting, use the hose with a wide sprayer setting to clean the coil thoroughly. Reinstall the fan, if applicable, and put the housing back together. If you intend to use the AC right away, let the unit dry for at least 60 minutes. In humid conditions, the system may need to sit for several hours.
Seasonal HVAC Maintenance in Omaha
Thermal Services, Inc. is an HVAC company located in Omaha, NE. We have served the region since 1968 and provide a full range of AC and heat pump maintenance services. Call today or contact us online with questions about HVAC maintenance or to schedule an AC tune-up.
