While there are a number of commercially available coil cleaning solutions on the market, air conditioner coils can be cleaned with a solution of a mild household detergent and water. The detergent and water mix is applied to the coil using a low-pressure sprayer.
Remove all panels that may be blocking access to the evaporator coils. Vacuum dirt and debris off of each coil with a soft-bristled brush attachment. Use a coil cleaning solution or mild detergent to dissolve dirt and grime further. Rinse off each coil with a wet cloth or towel until clean.
You could also use a homemade mix of water and mild detergent (like dish soap) instead of commercial chemical cleaners. After cleaning the coils, it's also a good time to inspect the other parts of the unit. Inspect the condensate drain pan and remove anything that doesn't belong there.
A dirty condenser coil restricts the dissipation of heat from the refrigerant, leading to reduced cooling efficiency. The air conditioner has to work harder and longer to achieve the desired temperature, resulting in increased energy consumption and higher utility bills.
Clogged or dirty air filters can restrict airflow and reduce your AC system's efficiency. Locate the air filters in your system and inspect them. If they're dirty or clogged, replace them with new ones. Solution: Check your air filter.
Most HVAC professionals recommend AC coil cleaning once or twice a year. If dust and dirt build up on the coils, major problems can occur. The AC coil cleaning cost is around $100 to $400 as of 2024, according to Homeguide (for an evaporator coil), and up to $700 to remove and clean the coil.
You can safely spray your AC unit(s) with water but if you feel nervous about cleaning while it's running, switch off the system first. Central air conditioning systems combine an inside unit where the evaporator coil is housed and an outside unit with the condenser, compressor, and fan.
After all, one thing we were all taught when we were very young is that water and electrical appliances don't mix. So how do you clean your outside AC unit? The good news is that you absolutely can spray water on your air conditioner if it needs a cleaning, and nothing bad will happen.
Here's what you'll need: Soft Brush: A soft-bristle brush is ideal for gently removing dirt and dust from the coil's surface without damaging the delicate fins. No-Rinse Coil Cleaner: This specialized cleaner is designed to dissolve dirt and debris on the evaporator coil without rinsing.
First, check your filters and coils for dirt and debris that may be impeding airflow. Once you've cleaned the filters and coils, run the air conditioner with just the fan so that the ice accumulation can melt off. If the AC still doesn't blow cold air, it could be that refrigerant levels are too low.
Lots of things can cause your blower to have trouble, especially if it gets too dirty. A fan clogged by dirt, a stuck wheel, broken motor, or a loose fan belt are all common problems that reduce the amount of airflow you feel coming from your vents. How to fix: Call an AC tech to examine and fix the blower.
Steps For Cleaning Evaporator Coils
Remove the access panel to expose the coil. If the coils are coated with dirt or lint, vacuum them with a soft brush attachment. If the coils are coated with oil or grease, clean them with a mild detergent and water solution and rinse. Be careful not to splash water on insulation.
To fix an AC not blowing cool air, ensure the thermostat is set to "cool" mode and the temperature is set lower than the current room temperature. Inspect the air filter as a dirty filter can restrict airflow. Ensure the condenser coils are clean and free of debris. Make sure vents are open and unobstructed.
If the coil is dirty, the refrigerant running through it won't be able to warm up as much as it's supposed to, which causes the water vapor to freeze instead of becoming a liquid. If this keeps happening, the entire coil may freeze and frost over.
Replacing an evaporator coil costs an average of $1,350, and it often ranges from $600 to $2,000 depending on the size, type, and the cost of pro labor in your area.
Signs that your AC coils need cleaning include reduced cooling efficiency, longer cooling times, and higher energy bills. If you notice these issues, it's time to clean the coils.
You can either use a commercial coil cleaner or make your own by mixing water and vinegar in a spray bottle. Spray the mixture onto the coils and let it sit for five to ten minutes to break down any stubborn dirt.