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AC Compressor Replacement Cost

Updated October 9, 2026

Replacing a failed central air conditioner compressor typically costs about $800 to $2,800 for parts and labor, according to Fixr, which puts the average at $1,550. This Old House reports the same $1,550 average for parts and professional installation. If the compressor is still under the manufacturer's parts warranty, Fixr estimates you may still pay $600 to $1,200 for labor and refrigerant.

AC compressor replacement cost at a glance

Each cost guide measures something slightly different, so the scope column matters as much as the price.

  • Fixr repair article (published July 31, 2026) — What the figure covers: Residential compressor replacement, parts and labor; Typical range: $800–$2,800; can top $3,000 on large or complex systems; Average: $1,550
  • Fixr AC repair cost page (updated Jan. 29, 2026) — What the figure covers: Compressor line in its AC repair table; Typical range: $600–$3,000; Average: Not given
  • This Old House (updated Aug. 31, 2026) — What the figure covers: Parts plus professional installation; based mainly on Angi estimates and a survey of 1,000 homeowners; Typical range: $700–$2,100 across 1.5- to 4-ton systems; Average: $1,550
  • PickHVAC (May 26, 2026) — What the figure covers: Direct compressor swap on a 2- to 3-ton R-410A split system; Typical range: $700–$2,800; Average: About $1,600

The figures broadly agree on a midpoint near $1,500 to $1,600. The spread comes mostly from system size, refrigerant type, access to the outdoor unit and local labor rates.

Cost by system size

Larger systems need larger compressors. "Tons" here describe cooling capacity, not electrical power: ENERGY STAR's contractor guide defines one ton as 12,000 Btu per hour of cooling, so a 3-ton system is rated at 36,000 Btu/h.

  • 1.5 ton — PickHVAC: compressor only: $400–$800; PickHVAC: installed: $700–$1,300; This Old House: installed (low–high, average): 1.5–2 ton: $700–$1,400 (avg. $1,050)
  • 2 ton — PickHVAC: compressor only: $500–$900; PickHVAC: installed: $800–$1,400; This Old House: installed (low–high, average): (same band)
  • 2.5 ton — PickHVAC: compressor only: $600–$1,000; PickHVAC: installed: $900–$1,600; This Old House: installed (low–high, average): 2.5–3 ton: $900–$2,100 (avg. $1,500)
  • 3 ton — PickHVAC: compressor only: $700–$1,200; PickHVAC: installed: $1,000–$2,100; This Old House: installed (low–high, average): (same band)
  • 3.5 ton — PickHVAC: compressor only: $800–$1,300; PickHVAC: installed: $1,100–$2,200; This Old House: installed (low–high, average): 3.5–4 ton: $1,100–$2,100 (avg. $1,600)
  • 4 ton — PickHVAC: compressor only: $900–$1,400; PickHVAC: installed: $1,200–$2,100; This Old House: installed (low–high, average): (same band)
  • 5 ton — PickHVAC: compressor only: $1,200–$1,800; PickHVAC: installed: $1,800–$2,600; This Old House: installed (low–high, average): Not listed

Sources: PickHVAC compressor prices by ton (dated June 24, 2025, labeled 2025 data); This Old House (updated Aug. 31, 2026).

Why a compressor swap costs so much

The part itself

The part alone is a large share of the bill. Fixr puts it at $400 to $1,800, and This Old House says the compressor by itself runs $950 or more. Brand, capacity and compressor type (single-stage, two-stage or variable-speed) all move the part price; PickHVAC's brand table puts high-capacity and variable-speed models at the top of each brand's installed-cost range.

Refrigerant has to come out and go back in

A technician can't simply unbolt a compressor. The system's refrigerant must first be recovered with proper equipment, and the system is recharged once the new compressor is in. Federal rules under Section 608 of the Clean Air Act require technicians who service or repair equipment that could release refrigerant to be EPA-certified, and EPA says knowingly venting refrigerants, including R-410A, is prohibited. PickHVAC lists a separate recharge at about $100 to $300 for R-410A and $300 to $800 for older R-22 systems, depending on how many pounds are needed.

Brazing, evacuation and cleanup

Compressors are brazed into the refrigerant lines. Lennox's installation instructions for one of its compressor replacement kits walk the technician through recovering all refrigerant, unsweating the old compressor, brazing the new one in, pressure-testing with dry nitrogen, pulling a vacuum in stages, and charging to the unit's specification. When a compressor burns out electrically, the same document calls for acid testing and replacing filter-driers, possibly more than once, until the system is clean. That cleanup is one reason two "compressor replacements" can be priced very differently.

Labor hours

PickHVAC estimates two to six hours and one or two technicians for a typical swap, at $75 to $125 an hour, or $225 to $750 in labor for a single unit. This Old House lists labor at $113 an hour or an average flat fee of $600. In its homeowner survey, 47% of people who repaired a compressor said the job took two to four hours, and nearly all reported eight hours or less.

Older R-22 systems cost more

No new R-22 has been produced or imported in the U.S. since January 1, 2020, according to EPA; servicing relies on reclaimed and previously produced supply. PickHVAC puts a compressor swap on a 2- to 3-ton R-22 system at $1,500 to $5,500, roughly double its R-410A range.

What the warranty covers (and what it usually doesn't)

Manufacturer warranties generally pay for the compressor part, not the labor to install it, so a covered failure still produces a bill. Two examples from manufacturer pages:

  • Trane: A five-year base limited warranty covers the compressor and parts. Registering within 60 days of installation extends that to 10 years, and some models carry up to 12 years on the compressor. Labor is not covered under either version. See Trane equipment on our Trane brand page.
  • Carrier: Unregistered equipment gets a standard five-year parts-only warranty. Registering within 90 days lets you choose 10 years of parts coverage, or five years of parts plus three years of labor if your installing dealer participates in Carrier's program. See our Carrier brand page.

With the part covered, Fixr estimates $600 to $1,200 for labor and refrigerant; PickHVAC's June 2025 guide gives the same range for labor.

Questions to ask before approving the work:

  1. Is the system registered, and what does the warranty certificate say for this serial number?
  2. Does the quote separate the compressor, refrigerant, filter-drier and labor?
  3. How was the failure confirmed? Lennox's kit instructions note the manufacturer may charge for a returned compressor it finds still working, so a documented electrical and mechanical check protects you.
  4. Is the labor guaranteed, and for how long?

Signs the compressor may be failing

Homeowners can notice symptoms, but only a technician with meters and gauges can confirm a compressor failure. Warning signs reported by This Old House and Bob Vila include:

  • Warm or weak air from the vents while the outdoor unit runs
  • Banging, rattling or clicking from the outdoor unit
  • The outdoor unit struggling to start, or not starting at all
  • A breaker that trips repeatedly
  • Short cycling (the system turning on and off frequently)

Several of these symptoms also have cheaper causes. PickHVAC advises testing the start capacitor and relays before condemning the compressor, and the Department of Energy's home cooling guide notes that compressor and fan controls can wear out when a system cycles on and off too often. Heat pumps use the same kind of outdoor compressor; Fixr lists heat pump compressor replacement at $800 to $2,500. You can compare ENERGY STAR certified air-source heat pumps if you are pricing alternatives.

When a new condenser or system may make more sense

A compressor replacement keeps the rest of an aging outdoor unit in service, including its coil, fan motor and controls. Signals that it's worth pricing a bigger replacement:

  • Age: ENERGY STAR suggests calling a contractor to evaluate a heat pump or air conditioner older than 10 years. This Old House recommends replacement over repair for systems older than 10 years.
  • The 50% rule: Fixr and This Old House both suggest replacing when the repair exceeds about half the price of new equipment.
  • The $5,000 rule: Fixr multiplies the repair quote by the system's age in years; above roughly $5,000, replacement usually wins.

For scale, This Old House lists a complete condenser replacement at $1,200 to $4,200 installed (average $2,700), and Fixr puts a new central AC system with installation at $3,000 to $7,500. EPA's HFC phasedown guidance says owners can keep repairing existing systems, including replacing a compressor or condensing unit, though it warns refrigerant and component availability may decline over time.

Example (illustrative, not a quote): Consider a 3-ton system in two situations.

  1. Three years old, registered, compressor covered: Out-of-pocket cost uses Fixr's covered-repair range of $600–$1,200. Fixr's screen: $600 × 3 = $1,800 and $1,200 × 3 = $3,600, both below $5,000, so repair is favored.
  2. Twelve years old, out of warranty: Use This Old House's 2.5–3 ton average of $1,500. Screen: $1,500 × 12 = $18,000, far above $5,000, so it is worth getting quotes for a new condenser or full system (including split-system heat pumps) before approving the repair.

These rules of thumb are screens, not verdicts; efficiency, refrigerant type and the condition of the indoor coil also matter.

Who should do the work

This is not a DIY repair. It involves refrigerant handling that legally requires an EPA Section 608–certified technician, brazing torches, and high-voltage wiring. Lennox's instructions specify a licensed professional HVAC installer or service agency, and Trane warns that DIY or handyman work will void its warranty. Ask to see the technician's Section 608 card; EPA says homeowners may do so.

FAQ

Is it worth replacing a compressor on a 10-year-old AC?

It can be if the rest of the system is in good shape and the quote is low relative to new equipment, but 10 years is the point where ENERGY STAR recommends a professional evaluation. Get a replacement quote alongside the repair quote.

Does the warranty cover the whole compressor replacement?

Usually not. Trane's base and registered warranties exclude labor, and Carrier covers labor only under an optional dealer-participation choice. Expect to pay for labor and refrigerant even when the part is free.

How long does a compressor replacement take?

PickHVAC estimates two to six hours. In This Old House's survey, nearly half of homeowners reported two to four hours.

Can a bad capacitor look like a dead compressor?

Yes. InspectApedia notes that a failed start or run capacitor can leave a motor humming without running, which is why PickHVAC recommends testing capacitors and relays before condemning the compressor. A capacitor replacement costs far less than a compressor.

Related guides

Sources