How to Clean HVAC Coils

Whether you have central air conditioning or a window unit, your heating, ventilating, and air conditioning (HVAC) coils need to be cleaned and maintained to ensure it properly cools your home while expending the least amount of energy. With regular use, air pollution, dirt and residue can build up on the HVAC coils, reducing their efficiency and the cooling power of your air conditioner. Clean your HVAC coils annually, (before or after the warm season) to keep your air conditioner operating with maximum efficiency.

Things You'll Need

• Screwdriver
• Garden hose
• No-rinse HVAC cleaner
• Coil brush (optional)

Instructions

1. Turn off the power supply to the air conditioner.

2. Remove the cover or housing from the air conditioner with a screwdriver. Refer to the owner's manual for location of the screws and type of screwdriver. If you're cleaning a window unit, take it outside onto a flat area.

3. Locate the coils inside the air conditioner. Spray the coils with a garden hose to rinse away excess dirt and debris. Take care not to bend the fins with high pressure water, and avoid spraying any electrical components.

4. Spray the coils thoroughly with HVAC cleaner, and scrub the coils with a coil brush if necessary.

5. Replace the cover or housing and turn on the power supply.

References

• The Family Handyman: Cleaning Air Conditioners in the Spring
• Handyman How-to: How to Clean Air Conditioner Evaporator Coils -- Part 2