The evaporator coil is an essential part of the air conditioner. When dirty, it reduces the efficiency of the unit and can cause bad odors and increase energy consumption. The good news is that you can perform a basic cleaning at home, as long as you follow the correct steps.
Attention Before You Begin
Unplug the air conditioner from the socket.
If possible, turn off the circuit breaker to avoid any electrical hazard.
Wear gloves and a mask, as there may be dust and mold accumulation.
Materials Needed
Soft-bristled brush or paintbrush
Clean, dry cloths
Specific air conditioning cleaning spray (found in hardware or HVAC stores)
70% alcohol (optional for light disinfection)
Step-by-Step Evaporator Coil Cleaning
1. Remove the Front Panel
Open the front cover of the split air conditioner. It usually comes off easily, but check for side locks.
2. Remove the Air Filters
Remove the filters and wash them with water and mild soap. Let them dry in the shade.
3. Access the Coil
With the filters out, the evaporator coil (the metal grid with fine fins) will be visible.
4. Clean with a Brush or Paintbrush
Run the brush gently over the fins to remove surface dust. Do not force it, as this may damage the aluminum fins.
5. Apply Spray Cleaner
Spray the coil cleaner evenly over the entire area. Follow the time indicated on the label (usually 10 to 20 minutes). It dissolves internal dirt and evaporates with moisture.
6. Dry with a Soft Cloth
Use a clean cloth to remove excess visible dirt after using the spray. Avoid getting it too wet.
7. Replace the Filters and Panel
After everything is dry, reattach the air filters and carefully close the front panel.
How Often Should You Clean?
The coil can be cleaned every 4 to 6 months in normal homes. In places with a lot of dust or heavy use, the frequency may be higher.
When to Call a Technician
If the coil has a lot of dirt or stubborn mold build-up, it is best to call a specialized technician for a deeper chemical cleaning with disassembly of the unit.
Conclusion
Keeping the evaporator coil clean improves the performance of your air conditioner, reduces energy consumption and prevents respiratory problems. With simple and regular care, you can increase the lifespan of the equipment and ensure more comfort at home.