How much does it cost to replace an HVAC coil?
An evaporator coil costs $1,000 to $2,500 under warranty and $2,500 to $4,500 or more without one, per HomeGuide.
No other component on an air conditioner swings this hard on one yes-or-no question, which is why the warranty is the first thing to check rather than the last. HomeGuide adds the detail that decides most cases: if the unit is under warranty the manufacturer covers the part, but most manufacturer warranties do not cover the labor. Angi's average across both situations is $1,350, with a range of $550 to $2,250.
This page is general information, not professional advice. Prices move with your equipment, your region and the season, and the only number that counts is a written quote from a licensed HVAC contractor who has looked at your system.
Air conditioner coil replacement cost by system size
| AC unit size | Coil replacement, installed |
|---|---|
| 1.5 – 2 ton | $1,000 – $2,000 |
| 2.5 ton | $1,500 – $2,500 |
| 3 ton | $1,800 – $3,000 |
| 3.5 ton | $2,000 – $3,500 |
| 4 ton | $2,300 – $4,000 |
| 5 ton | $2,800 – $4,500 or more |
Source: HomeGuide
Brand moves it as well. HomeGuide says coil replacement costs more on air conditioners from Carrier, Lennox or Trane than on mid-range brands like Goodman and Bryant, and warns that generic replacement parts sometimes cost less but may void the manufacturer's warranty.
Source: HomeGuide
Cost to replace the coil on an air conditioner: the labor
The coil is indoors, which is where the hours come from. HomeGuide says replacing an evaporator coil takes 2 to 4 hours depending on access, and up to 5 to 10 hours for attic and crawl space units that are difficult to reach. Technicians charge $75 to $150 an hour, plus $75 to $200 for a diagnostic service call that some companies credit against the repair.
Source: HomeGuide
Coil type shows up on the invoice too. HomeGuide says A-coils are the style used most often in home air conditioning systems, describes N-coils and Z-coils as more efficient because of the extra fin but more expensive, and calls slab coils less common. Cased coils arrive in a pre-fit insulated cabinet and cost more than uncased ones.
Source: HomeGuide
When the coil is not the right thing to fix
HomeGuide draws the line at about eight years. It says replacing the coil makes financial sense when the AC unit is less than 8 years old or still under warranty, and that for older units or ones with recurring problems, replacing the entire system may provide better long-term value.
Source: HomeGuide
Run the arithmetic before you decide. A coil at the top of the out-of-warranty band on a five-ton system is not far off the price of a new air conditioner, and a new air conditioner comes with a fresh warranty on everything else too.
The tool does that comparison for you against your own quote and system age: the HVAC replacement cost calculator.
What a failing coil looks like
- Warm air from the vents while the system is running.
- Frost or ice on the coil itself or on the refrigerant lines.
- The system starts and stops often without cooling the house.
- Water leaking near the indoor unit.
- Hissing or banging from the equipment.
HomeGuide is careful to add that many of these symptoms come from other, cheaper parts, and says to have a qualified technician diagnose the system rather than assuming. It also gives the two usual reasons a coil freezes: restricted airflow, often from a dirty filter or blocked return vents, and a refrigerant leak.
Source: HomeGuide
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Questions people ask next
- Is an evaporator coil covered by warranty?
- Often, and it is worth checking before anything else. HomeGuide says that if the unit is still under warranty the manufacturer covers the part, but that most manufacturer warranties do not cover the labor — which is why the covered price is still $1,000 to $2,500.
- How long does an evaporator coil replacement take?
- HomeGuide says 2 to 4 hours normally, and 5 to 10 hours for attic and crawl space units that are hard to access. That difference in hours is a large part of why two quotes on the same coil can be far apart.
- Is it worth replacing an evaporator coil?
- HomeGuide says it makes financial sense when the AC unit is less than 8 years old or still under warranty. For older units or ones with recurring problems it says replacing the entire system may provide better long-term value.
- What is the difference between the evaporator coil and the condenser coil?
- The evaporator coil sits indoors, usually beneath the blower inside the air handler or attached to the furnace, and pulls heat and moisture out of the air. The condenser coil sits outdoors and sheds that heat. HomeGuide prices them as separate jobs.
Written for homeowners by Most Recommended HVAC, which measures which HVAC companies AI assistants actually recommend in 26 U.S. metros. Nobody can pay to be on those lists. How we measure.