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Video · AC Maintenance and Coil Cleaning

AC Coil Cleaning, Start to Finish: Leaves, Foam and a Rinse

A real AC coil cleaning starts by clearing the debris trapped inside the unit's base, then foams the coil and rinses it. The foam lifts grime from deep in the fins, where a quick hose spray can't reach.

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What you’re seeing in this video

Turn the sound up for this one. It opens on the base of an outdoor AC unit beside a brick house, with dead leaves and mulch packed down inside, below the coil. The fan grille on top has to come off to get at a pile like that.

A tech in black with red gloves sprays foaming coil cleaner over the fins and lets it work, then rinses everything off with a garden hose until the water runs clear.

Job footageSwiftPro
Topic
AC Maintenance and Coil Cleaning
Length
0:29
Posted
August 10, 2026
Shot by
The SwiftPro crew, Northern Virginia

Why it matters in your house

  • Leaves inside the base hold water against the bottom of the coil and the base pan. That can rust the pan, block its drain holes and choke airflow right where the coil starts.
  • Use a cleaner made for AC coils, not household degreaser or bleach. The wrong chemical can eat the thin aluminum fins and the copper tubes they're bonded to.
  • Keep mulch and plantings back from the unit. Mulch piled against the cabinet washes in through the side slots, which is how a base fills up like this one.

How often should AC coils be cleaned?

Once a year for most homes, usually in spring before heavy use. Units near trees, cottonwoods, a dryer vent exhaust or a busy road may need it more often. Between cleanings, rinse loose debris off gently with a hose, power off first. A full foam cleaning with the top off is best left to a tech.

Want it done at your place? See AC Maintenance and Coil Cleaning at SwiftPro or call (703) 997-9757.

More videos from the SwiftPro crew

A young tech in a black SwiftPro polo stands beside an AC condenser in a backyard holding a tablet and explains how dirty AC coils raise costs on a 15-year-old unit.0:39Dirty Condenser Coil: Still Cooling, Still Doing DamageA tech pulls the media filter from an Aprilaire filter cabinet on a gas furnace in a laundry room.0:38AC Maintenance Before Summer: Filter Inside, Wiring OutsideA tech in a black SwiftPro polo and glasses stands in a leafy yard beside an outdoor AC condenser with its top off and explains how a dirty coil shortens the unit's life, pitching a professional coil 1:19Dirty AC Coil: Three Problems a Tech Points Out in the YardClose-ups of a heavily dirt-caked outdoor AC coil being brushed and rinsed, with the homeowner quote 'I don't think my AC coil needs cleaning...'.0:18AC Condenser Coil Cleaning for a Coil the Owner Thought Was FineA tech introduced as Diego, in a black SwiftPro polo and glasses, stands by an outdoor AC condenser with its top off and shows the common mistake when cleaning a coil, spraying it with a hose-end clea1:01How to Clean an Outside AC Unit: Rinse From the Inside OutClose-up of an AC condenser's insides: capacitor, wiring, filter drier and service valve.0:28AC Condenser Parts: Compressor, Coil, Capacitor and the Rest

See all 234 SwiftPro videos

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SwiftPro Heating, Cooling & Plumbing
4230 Lafayette Center Dr N, Chantilly, VA 20151
44679 Endicott Dr, Suite 211, Ashburn, VA 20147
Virginia Class A contractor license #2705192276

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