AC coil replacement cost averages about $1,350 for an evaporator coil, including labor and refrigerant, with most jobs between $627 and $2,700, according to This Old House’s 2026 data. In contrast, a new central AC averages about $6,000, so a new coil usually makes sense only when the rest of the system is young and in good shape.
Below, we first break down AC coil replacement cost by tonnage and coil type, compare it with a new system and explain how the refrigerant rules change the math. Prices checked on November 4, 2026.
AC coil replacement cost at a glance
| Job | Typical installed cost | Source |
|---|---|---|
| Evaporator coil replacement | $627–$2,700 (average $1,350) | This Old House (Apr. 6, 2026) |
| Evaporator coil only | $800–$1,600 midrange (range $400–$2,500) | PickHVAC (May 25, 2026) |
| Condenser coil only | $1,200–$2,200 midrange (range $500–$4,000) | PickHVAC (May 25, 2026) |
| Both coils, matched | $2,500–$4,500 midrange (range $1,200–$8,000) | PickHVAC (May 25, 2026) |
| Partial repair or clean-and-seal | $150–$800 | PickHVAC (May 25, 2026) |
| New 3-ton central AC | $6,000 average | Fixr (Jan. 28, 2026) |
Evaporator coil replacement cost by tonnage
| AC size | Low | Average | High |
|---|---|---|---|
| 2 tons | $550 | $1,250 | $2,000 |
| 2.5 tons | $650 | $1,400 | $2,100 |
| 3 tons | $700 | $1,550 | $2,350 |
| 3.5 tons | $750 | $1,650 | $2,500 |
| 4 tons | $800 | $1,700 | $2,600 |
| 5 tons | $900 | $1,800 | $2,700 |
Cost by coil type
Coil shape also matters. This Old House puts the average at about $1,300 for an A-coil, $1,550 for an N- or Z-coil and $1,200 for a slab coil.
What drives the AC coil replacement cost?
- Labor: in general, technicians charge about $75 to $150 an hour, and an evaporator coil swap typically takes 2 to 6 hours, according to PickHVAC.
- Refrigerant: a coil swap means opening the refrigerant circuit, and PickHVAC puts an R-410A recharge at $100 to $800.
- Warranty: if the coil is still under warranty, you mainly pay for labor and materials, This Old House says. Similarly, HomeServe lists $400 to $1,000 with warranty coverage versus $650 to $2,400 without it.
- Size and brand: larger systems have bigger coils; besides, brand-name coils often cost more, HomeServe notes.
- Access: coils in attics or tight closets also take longer to reach.
AC coil replacement vs a new system
This Old House offers a simple rule: if the system is under 10 years old and the repair costs 30% or less of a full replacement, repairing is typically the better value. Otherwise, a new system is usually the smarter buy.
| Your situation | Better choice |
|---|---|
| AC under 10 years old, coil still under warranty | Replace the coil |
| AC under 10 years old, repair under 30% of a new system | Replace the coil |
| Repair over 30% of a new system | Price a new system too |
| AC more than 10 to 15 years old | Price a new system |
| System still uses R-22 | Replace the system instead |
Overall, coils themselves typically last 10 to 15 years, according to This Old House and HomeServe. In addition, HomeServe warns that parts for older coils can be difficult, or even impossible, to find.
How refrigerant rules affect your coil decision
First of all, your coil has to match your outdoor unit’s refrigerant. Because manufacturers still make components for maintenance, NAHB notes, R-410A systems can still be repaired. However, if you upgrade the outdoor unit to an A2L refrigerant such as R-454B or R-32, North Carolina’s Office of State Fire Marshal says you must also replace the existing indoor coil or air handler.
In fact, the same guidance says there’s no approved method for putting an A2L coil inside an existing R-410A air handler; the whole air handler has to be replaced. For older R-22 systems, meanwhile, PickHVAC says converting the line set and coil to R-410A costs $900 to $2,500 in a midrange job and up to $4,000. At that point, therefore, a new system may make more sense.
Should you replace both coils at once?
PickHVAC puts a matched pair of coils at $2,500 to $4,500 for a midrange job, rising to $6,000 to $8,000 with a refrigerant conversion or a compressor replacement. Because that approaches the price of a new AC, replacing both coils is hard to justify on an older system. See our AC replacement cost guide for installed system prices, and read whether to replace your AC and furnace at the same time if your furnace is aging too.
Related guides: See also our guide on 14 vs 16 SEER2. Then check the numbers in our repair or replace calculator.
AC coil replacement cost FAQ
How long does it take to replace an evaporator coil?
In general, PickHVAC says one technician needs 2 to 6 hours. A condenser coil, on the other hand, takes 3 to 8 hours and sometimes two technicians.
Does a warranty cover AC coil replacement cost?
Generally, a parts warranty may cover the coil itself. Still, This Old House notes that you’ll usually pay for labor and materials, and most manufacturer warranties become void if a certified professional doesn’t do the work.
Can a leaking coil be repaired?
Sometimes. For example, This Old House says small pinhole leaks might be fixed with soldering or a specialized epoxy, and PickHVAC puts partial repairs or clean-and-seal jobs at $150 to $800.
Is a new coil worth it on a 12-year-old AC?
Often not, since ENERGY STAR suggests considering a new system once an AC is more than 10 years old, and This Old House’s repair rule applies to systems under 10 years old. So get a quote for both options before you decide.
Sources and review
Sources: This Old House, evaporator coil replacement cost (April 6, 2026); PickHVAC, AC coil replacement cost (May 25, 2026); HomeServe, AC coil replacement cost (September 5, 2024); Fixr, AC installation cost (January 28, 2026); North Carolina Office of State Fire Marshal, A2L partial replacement interpretation (June 6, 2025); NAHB, EPA final rule on R-410A installations (May 26, 2026); ENERGY STAR, when is it time to replace?. All checked on November 4, 2026.
Written by: HVAC Switch. Last updated: November 4, 2026. Read our editorial policy to learn how we research prices, or contact us if you spot an error.