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Video · Ductless Mini Splits

Mini Split Replacement: The Joke, Then the Line Set Work

A mini split replacement can go quickly, but the line set connections, the vacuum and the wiring can't be rushed. Those steps decide whether the new system lasts or leaks refrigerant within a year.

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What you’re seeing in this video

The joke: the customer asks how soon it can be done, and the tech's answer is say less. A young SwiftPro tech in a backwards cap and SwiftPro hoodie reacts to the camera holding a yellow tool indoors.

Then the real work. On the lawn, a bearded tech in a camo hoodie kneels at a new outdoor mini split condenser, wiring the unit and connecting the line sets, the insulated copper refrigerant lines that run through the wall to the indoor head.

Job footageSwiftPro
Topic
Ductless Mini Splits
Length
0:18
Posted
September 21, 2026
Shot by
The SwiftPro crew, Northern Virginia

Why it matters in your house

  • Mini split line sets connect with flare fittings. A flare that's cut or tightened badly is the most common source of slow refrigerant leaks on ductless systems.
  • After the lines are connected, the system should be pressure tested and pulled into a deep vacuum to remove air and moisture before refrigerant is released. Skipping it shortens the compressor's life.
  • Ask your installer whether the old line set is being reused or replaced, and why. Reusing one is sometimes fine, but it should be flushed or checked first.

How long does a mini split replacement take?

A single-zone swap on an existing line set often fits in a day, and multi-zone systems or new line routes take longer. What matters more than speed is that the tech pressure tests the lines, pulls a proper vacuum and checks the charge before calling it done. Rushing those steps is how leaks start.

Want it done at your place? See Ductless Mini Splits at SwiftPro or call (703) 997-9757.

More videos from the SwiftPro crew

Mini split maintenance: a tech works under the eaves outside, a tech in a camo hoodie works on the outdoor mini split's control board with Milwaukee tools on the unit, and a tech on a ladder lifts the0:31Mini Split Maintenance: Indoor Filters and the Outdoor UnitA mini-split outdoor unit opened up with a Milwaukee drill and screwdriver on top, showing the control board.0:28How Does a Mini Split Work? Outdoor Unit to Ceiling CassetteAttic before/after: old foil-wrapped plenum and flex duct (R-4.2) with a can of Spray-N-Seal, then new sheet metal with a SwiftPro decal and SwiftPro equipment checkup label.0:13Attic Air Handler Replacement, Seen From the Duct SideBasement furnace replacement: two techs pull the old furnace out, captions explain poor airflow and aging furnace, then a new Rheem furnace (Rheem logo legible) installed on a tile floor; phone 571-470:34Dirty Furnace Filter or Tired Furnace? Why Heating Bills ClimbAir duct cleaning: a tech with a headlamp and respirator works at a return in a living room beside a bookshelf, a floor register caked with dust, and a red vacuum hose fed into the duct opening.0:29Why Is My House So Dusty? Start at the Floor RegisterWater heater flushing explainer: a tech kneels at a GE electric water heater beside a SwiftPro van, then a tech kneels at a basement gas water heater pointing at the drain while the homeowner watches.0:30How Often to Flush a Water Heater: The Drain Valve Explained

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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