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Video · AC Maintenance and Coil Cleaning

AC Condenser Coil Cleaning for a Coil the Owner Thought Was Fine

If you can't see light through your outdoor coil's fins, it needs cleaning. Dirt packs in so evenly that a coil can look gray and normal from a few feet away while barely moving any air.

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Licensed and insuredVirginia Class A contractor #2705192276

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What you’re seeing in this video

The setup is a line every tech has heard: I don't think my AC coil needs cleaning. Then the camera goes close on that coil, and the fins are caked solid with a layer of dirt so thick the fin pattern disappears.

A tech's hand works a brush along the fins, peeling the mat away in strips, then a rinse washes out what the brush loosened. The bare metal underneath looks nothing like the before.

Job footageSwiftPro
Topic
AC Maintenance and Coil Cleaning
Length
0:18
Posted
July 24, 2026
Shot by
The SwiftPro crew, Northern Virginia

Why it matters in your house

  • Brush along the fins, top to bottom, never across them. The aluminum fins fold over at a touch, and a row of flattened fins blocks air just like dirt does.
  • Check your own coil by shining a flashlight through the fins from one side. If light passes easily, you're fine. If it looks like felt, plan a cleaning before the heat comes.
  • Dryer lint, grass clippings and cottonwood fluff are the usual culprits. If your dryer exhaust or mower discharge points at the unit, redirect it, or you'll be cleaning this every year.

Does my AC coil really need cleaning?

If it's been more than a year or two, probably. Look at the outdoor unit with the power off: matted fins, fuzz, leaves at the base or a gray film you can't see through all mean yes. A clean coil helps the system run cooler and use less power, and it's one of the cheapest ways to protect the compressor.

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 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 YardA 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 OutOutdoor AC condenser cleaning: leaves and mulch packed inside the base, then a tech in black with red gloves sprays foaming coil cleaner and rinses the coil with a hose beside a brick house.0:29AC Coil Cleaning, Start to Finish: Leaves, Foam and a RinseA 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 OutsideClose-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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