How Much Does It Cost To Replace an AC Compressor?
The total cost to replace a home AC compressor ranges from $800 to $3,400+ depending on the size of your system, the brand of compressor, and whether the part is under warranty. Most homeowners pay between $1,200 and $2,800 for a standard residential compressor replacement including parts and labor.
Here's the deal: that range is wide because a 1.5-ton compressor for a small condo and a 5-ton compressor for a 3,000 sq ft home are completely different animals. The tonnage of your AC system is the single biggest cost factor.
If your compressor is still under the manufacturer's warranty (typically 10 years if registered), you'll only pay for labor — which drops the total to $600–$1,200. More on warranties below.
AC Compressor Replacement Cost by Tonnage
This is the headline table. Find your AC tonnage and you'll have a realistic cost range for the full replacement including parts, labor, and basic components.
| AC Size (Tons) | BTU Capacity | Part Cost (Only) | Installed Cost (Total) |
|---|
| 1.5 ton | 18,000 BTU | $250–$600 | $700–$1,300 |
| 2 ton | 24,000 BTU | $350–$700 | $800–$1,400 |
| 2.5 ton | 30,000 BTU | $450–$900 | $900–$1,800 |
| 3 ton | 36,000 BTU | $500–$1,200 | $1,000–$2,100 |
| 3.5 ton | 42,000 BTU | $600–$1,400 | $1,100–$2,400 |
| 4 ton | 48,000 BTU | $700–$1,600 | $1,300–$2,800 |
| 5 ton | 60,000 BTU | $900–$2,000 | $1,800–$3,400 |
Sources: Angi, HomeAdvisor, This Old House, Bob Vila, HomeGuide, PickHVAC (recent pricing data)
A useful rule of thumb: a 5-ton compressor costs roughly twice what a 2.5-ton compressor does. Not sure what tonnage you have? Check the model number on your outdoor unit's data plate — the tonnage is embedded in the number.
You can also use our AC tonnage calculator to figure it out from your home's square footage.
Keep in mind that these ranges assume a standard single-stage scroll compressor replacement on a system less than 15 years old. Older units with hard-to-find parts, or premium variable-speed systems, can push costs significantly higher.
AC Compressor Replacement Cost Breakdown: Parts, Labor, and Refrigerant
When you get a quote for compressor replacement, you're really paying for three things: the compressor itself, the labor to install it, and the refrigerant charge. Let's break each one down so you know exactly where your money is going.
| Cost Component | Cost Range | % of Total | Notes |
|---|
| Compressor (part) | $400–$2,550 | 40–55% | Depends on tonnage, brand, type |
| Labor | $600–$1,200 | 35–50% | 4–8 hours at $75–$150/hr |
| Refrigerant (R-410A) | $160–$600 | 5–15% | $40–$90/lb installed; 4–12 lbs needed |
| Filter drier | $50–$150 | ~3% | Required — removes moisture from lines |
| Contactor/capacitor | $100–$400 | ~5% | Usually replaced preventatively |
| TOTAL | $1,200–$3,400+ | 100% | Most homeowners: $1,500–$2,800 |
Sources: Power Pro Plumbing, Angi, HomeAdvisor, Trane.com, Atlas AC Repair
AC Compressor Part Cost
The compressor unit itself typically runs $400 to $2,550 for the part alone. A standard 3-ton scroll compressor from Goodman might cost $500–$800 for the part, while a 5-ton Trane variable-speed compressor can exceed $2,000.
The part price depends primarily on tonnage, then on brand and compressor type. We'll cover both of those in detail below.
Labor Cost To Replace AC Compressor
Labor runs $600 to $1,200 for a residential compressor replacement. HVAC technicians typically charge $75 to $150 per hour, and a compressor swap takes 4 to 8 hours of skilled work.
This isn't just "unscrew the old one, bolt in the new one." A proper compressor replacement involves recovering all existing refrigerant (per EPA regulations), cutting the old compressor out of the refrigerant lines, brazing the new compressor into the copper lines with a high-temperature torch, installing a new filter drier, pressurizing the system with nitrogen to leak-test every joint, pulling a deep vacuum to below 500 microns, and finally charging the system with the factory-specified weight of refrigerant.
That's why labor accounts for 35–50% of the total bill — this is genuinely complex, time-intensive work.
Refrigerant Recharge Cost After Compressor Replacement
When a compressor is replaced, all refrigerant must be recovered from the system first. After installation, the system needs a complete recharge.
R-410A refrigerant (the standard for systems installed after 2010) costs $40 to $90 per pound installed. A typical central AC system holds 6 to 15 pounds depending on tonnage, though a partial recharge of 4–8 pounds is more common during a compressor swap.
Budget $160 to $600 for the refrigerant portion of the job. One important note: R-410A is being phased down under the AIM Act, with new systems transitioning to R-454B or R-32 — but R-410A will remain available for existing system repairs for years to come. If your system still uses the older R-22 (Freon), the refrigerant alone could cost $90 to $150 per pound, making a compressor-only replacement much harder to justify financially.
You can learn more about proper charge levels and what your technician should be checking in our guide on AC refrigerant charge.
Not all compressors are built the same. The type of compressor in your system significantly affects both the replacement cost and what you should expect from a new one.
| Compressor Type | Part Cost | Where It's Found | Key Characteristics |
|---|
| Reciprocating (piston) | $400–$1,000 | Older/budget systems (pre-2010) | Piston-driven; more moving parts; louder; less efficient |
| Scroll | $600–$1,800 | Most modern residential AC | Two interlocking scrolls; fewer parts; quieter; 10–15% more efficient than reciprocating |
| Rotary | $50–$250 | Mini-splits, window AC | Compact; designed for smaller systems; very quiet |
| Two-stage | $1,000–$2,000 | Mid-range systems | Runs at high or low speed; better humidity control; quieter at low stage |
| Variable speed (inverter) | $1,500–$2,800 | Premium/high-efficiency | Continuously adjusts output; 30–40% energy savings; quietest; most expensive to replace |
Sources: This Old House, HomeAdvisor, Blue Water Climate Control
If your system was installed in the last 10–15 years, it almost certainly has a scroll compressor. These are the workhorses of residential HVAC — reliable, efficient, and reasonably priced to replace.
Variable-speed (inverter) compressors are a different story. Found in premium systems like the Carrier Infinity, Lennox Signature, and Trane XV series, these compressors deliver exceptional efficiency and comfort but cost $1,500 to $2,800 just for the part. If your variable-speed compressor fails out of warranty, the cost-benefit math often tips toward replacing the entire system.
Here's an important note: you can't just choose a different compressor type as an "upgrade" during a replacement. Your system is engineered to work with a specific compressor — the metering device, refrigerant charge, and airflow are all matched to it. Always replace with the correct compressor for your system.
For more context on how compressor type connects to your system's efficiency, see our SEER rating guide.
AC Compressor Cost by Brand
Brand matters — not necessarily because one compressor is dramatically "better" than another, but because pricing, parts availability, and warranty terms vary significantly between manufacturers.
| Brand | Part Cost (Only) | Installed Cost Range | Warranty (Registered) | Price Tier |
|---|
| Goodman/Amana | $400–$1,200 | $1,000–$1,800 | Lifetime compressor (select models) | Budget |
| Rheem/Ruud | $600–$1,400 | $1,200–$2,000 | 10-year parts & compressor | Mid-range |
| Carrier | $450–$2,000 | $1,400–$2,500 | 10-year parts & compressor | Premium |
| Trane/American Standard | $450–$2,200 | $1,500–$2,500 | 10–12 year compressor | Premium |
| Lennox | $600–$2,300 | $1,500–$2,800 | 5–10 year (varies by series) | Premium |
Sources: PickHVAC, Modernize, Atlas AC Repair, Angi
A few things to note. Goodman/Amana is the clear budget winner — and their lifetime compressor warranty on select models is genuinely the best in the industry. If you own a registered Goodman unit with a 14 SEER or higher system, the compressor itself may be covered for the entire time you own your home.
You'd only pay labor.
Lennox tends to be the most expensive because they use proprietary components. Lennox parts aren't as widely stocked by distributors, which can add both cost and wait time. That said, Lennox Signature series units are among the highest-efficiency systems available.
Trane and Carrier are close in price and both sit in the premium tier. Both offer 10-year registered warranties, with Trane extending to 12 years on select compressors.
Sister brand tip: Goodman makes Amana. Rheem makes Ruud. Trane makes American Standard. If your tech says a compressor for your brand is hard to find, ask about the sister brand — the parts are often identical.
Signs Your AC Compressor Is Failing
Before you spend $1,500+ on a compressor replacement, make sure the compressor is actually the problem. Some of these symptoms can be caused by simpler (and cheaper) issues like a bad capacitor, a faulty contactor, or low refrigerant from a leak.
| Symptom | What You'll Notice | Could Also Be |
|---|
| Won't start (humming/clicking) | Outdoor unit hums but compressor doesn't kick on; relay clicks repeatedly | Bad capacitor ($150–$300 fix), bad contactor ($150–$250) |
| Running but not cooling | System runs, fan blows, but air from vents is warm | Low refrigerant charge, bad refrigerant charge, dirty evaporator coil |
| Tripping the circuit breaker | AC breaker trips when compressor tries to start | Wiring issue, ground fault, oversized breaker |
| Hard starting | Unit shudders/vibrates violently on startup | Failing start capacitor, weak electrical supply |
| Unusual noises | Banging, grinding, rattling, or screeching from outdoor unit | Loose fan blade, debris in unit, failing fan motor |
| Short cycling | Compressor runs only a few minutes, shuts off, restarts | Dirty condenser coils, refrigerant issues, oversized system |
| Higher energy bills | Sudden unexplained spike in electricity cost | Dirty filter, duct leaks, other efficiency losses |
| Refrigerant leaks | Ice on refrigerant lines, hissing sounds, oil stains near outdoor unit | Line set leak, coil leak (not always compressor) |
Sources: HomeGuide, Cielo WiGle, Peaden Air, Scott-Lee Heating, J.A. Bertsch
Here's our honest advice: never let a technician diagnose a "bad compressor" without showing you the evidence. A competent tech should be able to show you specific electrical readings (megohm test for grounded windings, amp draw readings) or refrigerant gauge readings that confirm the compressor has failed internally.
If you're hearing the compressor try to start but it won't engage, ask the tech to test the start capacitor and contactor first. These are $150–$300 fixes compared to a $2,000+ compressor replacement. A shady tech might skip the cheap diagnosis and jump straight to the expensive one.
If your AC is not blowing cold air or the outside unit isn't running, start with those troubleshooting guides before assuming the worst.
Replace AC Compressor or Replace the Entire System?
This is the most important section of this article. The age of your system is the single biggest factor in deciding whether a compressor replacement makes financial sense.
The Age-Based Decision Framework
| Unit Age | Recommendation | Why |
|---|
| Under 5 years | ✅ Replace compressor | Almost certainly under warranty. Pay labor only ($600–$1,200). System has 10+ years of life left. No question — replace the compressor. |
| 5–10 years | ✅ Replace compressor (check warranty first) | Most registered systems still have parts coverage. If under warranty, you're paying $600–$1,200 total. Even without warranty, the system has substantial life left. |
| 10–12 years | ⚖️ Case by case | Approaching end of warranty and design life. Weigh repair cost against system condition. Use the $5,000 Rule (explained below). Consider: have there been other repairs? Is the system R-410A or R-22? |
| 12–15 years | ⬆️ Lean toward full replacement | Near or at end of typical AC lifespan (how long do AC units last). Other components wearing out. New system brings 15+ SEER vs your old 10–13 SEER — real energy savings. |
| 15+ years | 🔄 Replace the entire system | System has exceeded typical design life. Parts may be hard to source. Likely uses R-22 (no longer manufactured) or early R-410A. A new system with a modern SEER rating can cut cooling costs by 20–40%. |
Sources: HVAC.com, Home Depot, J.A. Bertsch, B&B ClimateCare, Today's Homeowner
The $5,000 Rule
Here's a handy decision tool we recommend. Multiply the cost of the repair by the age of the system in years:
Repair Cost × System Age = Decision Number
If the result is above $5,000, lean toward replacing the whole system. If it's below $5,000, repair is probably the smarter move.
Let's apply it to the scenario from the opening: $2,800 repair × 11 years old = $30,800. That's way over $5,000 — the math says replace the system.
Now consider a different scenario: $1,200 repair (under warranty, labor only) × 7 years old = $8,400. Still over $5,000, but the low out-of-pocket cost of $1,200 makes the compressor replacement a reasonable call, especially since the system has 8+ years of life left.
The $5,000 rule is a guideline, not gospel. But it's a useful gut-check that factors in both cost and remaining lifespan.
What About the R-22 Factor?
If your system uses R-22 (Freon) refrigerant — meaning it was installed before 2010 — this changes the math dramatically. R-22 production was banned in the United States in 2020, and remaining stockpiles cost $90 to $150 per pound (compared to $40–$90 for R-410A).
A compressor replacement on an R-22 system means you'll need a full R-22 recharge at those inflated prices. For a 3-ton system, that's 6–9 pounds of R-22 at $90–$150/lb = $540 to $1,350 just for refrigerant. Combined with the compressor and labor, you're looking at $2,500+ for a system that's already 15+ years old.
Our recommendation: if your system uses R-22, replace the entire system with a modern R-410A (or R-454B) unit. You'll save money on refrigerant for the rest of the system's life, get a new warranty, and gain significant energy efficiency improvements.
You can learn about the different refrigerant types and their compatibility requirements in our dedicated guide.
AC Compressor Warranty: What's Covered and What Isn't
Warranty coverage can turn a $2,500 compressor replacement into a $600–$1,200 labor-only repair. Here's what you need to know about coverage from the major manufacturers.
| Brand | Base Warranty (Unregistered) | Registered Warranty | Compressor Specific | Key Requirement |
|---|
| Goodman/Amana | 5-year parts | 10-year parts | Lifetime (select models) | Register within 60 days; original owner only |
| Carrier | 5-year parts | 10-year parts & compressor | 10 years | Register within 90 days; first owner only |
| Trane/American Standard | 5-year compressor & parts | 10-year compressor & parts | 10–12 years | Register within 60 days |
| Lennox | Varies by series | Varies by series | 5–10 years | Signature: 10yr; Elite: 10yr compressor; Merit: 5yr |
| Rheem/Ruud | 5-year parts | 10-year parts | 10 years | Some models include unit replacement guarantee |
Sources: Trane.com, Goodman.com, Direct Heating & Cooling, All Year Cooling, ConsumerAffairs
Three critical warranty facts every homeowner should know:
1. Warranties cover parts only — not labor. Even with a valid warranty, you're still on the hook for $600–$1,200 in labor costs. The manufacturer sends a replacement compressor; your tech does the installation work on your dime.
2. Registration is everything. An unregistered Trane compressor has a 5-year warranty. A registered one has 10–12 years. That's the difference between paying $600 for labor and paying $2,500 for everything. If you just had a new system installed, register it immediately — most brands require registration within 60 days.
3. Warranties usually don't transfer. If you buy a home with a 4-year-old Carrier system, you may only get 5 years of coverage instead of the full 10 — because the warranty was tied to the original purchaser. Exceptions exist (Florida now requires warranties to run with the property), but check your specific warranty terms.
What Else Gets Replaced During a Compressor Swap?
A compressor replacement isn't just the compressor. Several supporting components should be replaced at the same time — and a reputable technician will include them in the quote.
| Component | Why It's Replaced | Typical Cost |
|---|
| Filter drier | Required — traps moisture and debris that would destroy the new compressor | $50–$150 |
| Contactor | Frequently replaced preventatively — it's a $50 part that can kill a $1,500 compressor | $50–$200 |
| Start/run capacitor | Old capacitor can cause the new compressor to work harder than necessary | $50–$150 |
| Hard start kit | Reduces electrical stress during startup; extends compressor life | $75–$200 |
| Compressor leads and lugs | New electrical connections for the new compressor | Usually included |
| Refrigerant | Full system evacuation and recharge is required | $160–$600 |
If a tech gives you a compressor replacement quote that doesn't include a new filter drier, that's a red flag. The filter drier is non-negotiable — it removes moisture from the refrigerant lines, and installing a new compressor without one is a recipe for premature failure.
After the compressor is installed and the system is charged, a good technician will also verify the superheat and subcooling readings to confirm the refrigerant charge is correct. This is the final quality check that separates a proper installation from a hack job.
How To Get a Fair Price on AC Compressor Replacement
This is genuinely expensive work, and we don't want you to think every HVAC company is trying to rip you off. That said, the difference between a fair price and a gouged price can be $1,000+ for the same job. Here's how to protect yourself.
1. Get at least three quotes. This is the single most important thing you can do. Compressor replacement quotes can vary by $500–$1,500 between companies in the same city. Three quotes give you a realistic sense of the local market rate.
2. Ask for an itemized breakdown. A reputable company will break the quote into: compressor part cost, labor hours, refrigerant, and additional components. If a company gives you one lump number and won't itemize, that's a yellow flag.
3. Check warranty status first. Before you accept any quote, look up your system's warranty. Find the model and serial number on the outdoor unit's data plate and check the manufacturer's website. A tech who doesn't ask about your warranty status before quoting is either lazy or hoping you don't know about it.
4. Ask what else they're replacing. The quote should include a new filter drier at minimum. Ask about the contactor and capacitor. A good tech will recommend replacing these cheap components preventatively while the system is already open.
5. Verify the diagnosis. Ask the tech to show you the electrical test results (megohm readings, amp draw) that prove the compressor is bad. A compressor diagnosis should involve specific measurements, not just "it sounds bad" or "it won't start."
6. Consider the season. HVAC companies are slammed in June, July, and August. If you can wait until September through March (offseason), you may find lower labor rates and faster scheduling. Obviously, if it's 95°F outside, waiting isn't realistic.
Red flags to watch for:
- Tech diagnoses a "bad compressor" within 5 minutes without taking electrical measurements
- Quote doesn't include a new filter drier
- Company refuses to itemize the quote
- Tech doesn't ask about or check your warranty status
- Price is more than double the high end of ranges in our tables above
Can a Homeowner Replace an AC Compressor?
No. This is emphatically not a DIY job, even for experienced homeowners. Here's why:
1. Federal law requires EPA Section 608 Certification to work on any equipment that contains refrigerant. Under the Clean Air Act (40 CFR Part 82, Subpart F), anyone who maintains, services, or repairs equipment that could release refrigerants must be certified. Fines for violations can reach tens of thousands of dollars per day.
2. Brazing (torch welding) on copper refrigerant lines is required to install the new compressor. This is a specialized skill with serious fire risk.
3. The system must be evacuated with a vacuum pump to below 500 microns before charging. Improper evacuation introduces moisture, which creates acids that destroy the new compressor from the inside.
4. Homeowners cannot legally purchase refrigerant without EPA 608 certification. The refrigerant R-410A operates at extremely high pressures (400+ PSI) and mishandling can cause serious injury or death.
5. High-voltage electrical work (240V) is required, including working near capacitors that can hold a lethal charge even when the power is off.
6. Any manufacturer warranty is void if the work is not performed by a licensed HVAC professional.
We're all for DIY when it makes sense. This isn't one of those times. The combination of federal certification requirements, specialized tools (brazing equipment, vacuum pump, manifold gauges, micron gauge, nitrogen tank), and genuine safety risks means this job belongs to a licensed HVAC technician.
The parallel in the HVAC world is the cracked heat exchanger repair — another expensive component where the repair-vs-replace decision is just as consequential, and the work is just as firmly in the "hire a professional" category.
Heat Pump Compressor Replacement Cost
If you have a heat pump instead of a standard AC, the compressor replacement process is essentially the same — but costs tend to run slightly higher because heat pump compressors work year-round (heating and cooling) and are often more complex units.
| Heat Pump Size | Installed Compressor Replacement Cost |
|---|
| 1.5–2 ton | $800–$1,600 |
| 2.5–3 ton | $1,200–$2,200 |
| 3.5–4 ton | $1,500–$2,800 |
| 5 ton | $2,000–$3,400 |
Sources: Bob Vila, LearnMetrics, PickHVAC
Heat pump compressors run in both directions (reversing valve switches between heating and cooling modes), so they experience more wear than AC-only compressors. They also tend to use scroll or inverter-type compressors, which are more expensive to replace.
All of the same decision factors apply: check warranty status, consider system age, and use the $5,000 rule to decide between a compressor replacement and a full system swap.
Frequently Asked Questions
How much does it cost to replace an AC compressor?
AC compressor replacement costs $1,200 to $3,400 installed for most residential systems. The average homeowner pays around $1,500 to $2,800, depending primarily on system tonnage, brand, and warranty status.
If the compressor is still under warranty, expect to pay only $600–$1,200 for labor.
Is it worth replacing the compressor on a 10-year-old AC?
It depends on warranty status and overall system condition. If the compressor is still under warranty and the system has been well-maintained, a compressor replacement at 10 years can be worthwhile — you're paying labor only and potentially getting 5–8 more years from the system.
If it's out of warranty, use the $5,000 rule: multiply the repair cost by the system age. If the result exceeds $5,000, a full system replacement is likely the smarter investment.
How long does an AC compressor last?
Most residential AC compressors last 10 to 15 years, which is roughly the same as the lifespan of the AC unit itself. With proper maintenance — annual tune-ups, clean condenser coils, and correct refrigerant charge — some compressors can last 15–20 years. Premature failure is most commonly caused by refrigerant problems, electrical issues, or lack of maintenance.
What is the most common cause of AC compressor failure?
Refrigerant issues — either too much or too little — are the leading cause of premature compressor failure. Low refrigerant from a leak forces the compressor to run continuously, eventually overheating it. Overcharging creates excess pressure that damages internal components. Other common causes include dirty condenser coils, electrical problems (voltage fluctuations, bad capacitors), and contaminated refrigerant oil.
Can I just replace the compressor in my AC unit?
Yes — a licensed HVAC technician can replace only the compressor without replacing the entire outdoor unit or full system. However, just because you can doesn't mean you should. If your system is over 12–15 years old, uses R-22 refrigerant, or has had multiple recent repairs, replacing the entire system is usually a better financial decision in the long run.