AC Evaporator Coil Replacement Cost

The evaporator coil sits inside, above the furnace or air handler, and absorbs heat from the air. Angi puts replacement at $1,350 on average, with a range of $550 to $2,250. HomeGuide's totals, which include refrigerant, are higher: $1,000 to $2,500 under warranty and $2,500 to $4,500+ out of warranty.

Cost by AC size

Cost by coil type

Labor and warranty

Angi puts labor at about $700, with a range of $400 to $1,000. HomeGuide lists technicians at $75 to $150 per hour and diagnostic calls at $75 to $200. Most manufacturer warranties cover the coil itself but not labor, so even a warranty replacement costs over $1,000 on HomeGuide's figures. Refrigerant handling requires a licensed technician.

Condenser coil vs evaporator coil

The condenser coil is in the outdoor unit and releases heat. Angi lists condenser coil replacement at about $800. See AC condenser replacement cost.

Signs of a failing evaporator coil

• The AC runs but the air is not cold.
• Ice on the indoor coil or refrigerant lines.
• The system needs refrigerant added repeatedly.
• A hissing sound near the indoor unit.

A small leak is sometimes repairable. HomeGuide lists refrigerant leak repair at $200 to $1,500. See AC freon leak repair cost.

Replace the coil or the whole system?

The new coil must match the outdoor unit's refrigerant and capacity. On an old system, especially one that uses R-22, a coil replacement can cost a large share of a new AC. Angi notes a one-point SEER increase could mean a $2,000 difference in system price, so ask for quotes on both. See AC replacement cost.

Cleaning instead of replacing

A dirty coil cuts cooling but is not a failed coil. HomeGuide's maintenance guide lists evaporator coil cleaning at $100 to $400. See AC tune-up cost.

Which coil?

An AC system has two coils. The evaporator coil sits indoors on top of the furnace or air handler and absorbs heat from the air. The condenser coil wraps the outdoor unit and releases that heat outside. Either can develop leaks, but evaporator coil replacements are the more common repair.

Signs of a failing coil

• The system loses refrigerant repeatedly.
• Weak cooling and long run times.
• Ice forming on the coil or refrigerant lines.
• A technician finds a leak with an electronic detector or dye.

Why coils fail

Corrosion is the usual cause, including formicary corrosion in copper coils that creates tiny pinhole leaks. Physical damage, vibration and poor maintenance also play a part.

What affects the price

• Coil size and type, matched to the outdoor unit.
• Refrigerant type. Systems using older refrigerants such as R-22 cost more to recharge.
• Access. Attic and closet installations are harder to reach.
• Labor, including recovering refrigerant, brazing, pulling a vacuum and recharging.
• Warranty. Many coils carry manufacturer parts warranties; labor may not be covered.

Repair or replace the system?

If the system is older, uses phased-out refrigerant, or has other problems, replacing the whole system may make more sense than a new coil. A coil replacement on a newer system under parts warranty is usually worth doing.

Questions to ask

1. Is the coil covered under the manufacturer's warranty?
2. Does the price include refrigerant and a new filter drier?
3. Given the system's age, would replacement be a better value?

In Texas

Texas air conditioners run hard for much of the year, and many indoor coils sit in hot attics. Keeping filters clean and coils maintained reduces the strain that leads to coil failures.

Refrigerant type and coil replacement

The coil must work with the refrigerant your system uses. Older systems built for R-22 are a special case. R-22 is no longer produced in the US, and the remaining supply is costly. Replacing a coil on an R-22 system means either finding a compatible coil and paying for scarce refrigerant, or converting to a different refrigerant, which may not be practical. In many cases, an R-22 system with a failed coil is a strong candidate for full replacement.

Newer systems have also moved to lower-impact refrigerants such as R-454B and R-32. A replacement coil has to be compatible with the refrigerant and the outdoor unit, so matching parts matters more than ever.

Matching the coil to the system

Indoor coils come in different sizes, shapes and capacities, and the coil must match the outdoor unit's capacity and the furnace or air handler cabinet it sits on. A mismatched coil can lower efficiency, reduce cooling and shorten compressor life. It can also void warranties. Manufacturers publish matched combinations, and a good contractor will install a coil from that list or confirm the match.

What the job involves

Replacing an evaporator coil is a significant job. The technician recovers the refrigerant, disconnects the refrigerant lines and the condensate drain, and removes the old coil from its housing above the furnace or inside the air handler. The new coil is installed, brazed into the lines, and the system is pressure-tested with nitrogen to check for leaks. It is then evacuated with a vacuum pump to remove air and moisture, recharged to the manufacturer's specification and tested.

Skipping the pressure test or the evacuation can lead to leaks or moisture problems that damage the new coil or the compressor.

Getting more life from your coils

• Change the air filter on schedule. A dirty filter lets dust coat the evaporator coil.
• Keep the outdoor unit clear of grass clippings, leaves and plants, and rinse the condenser coil gently with a hose.
• Have the coils inspected and cleaned during regular maintenance.
• Fix refrigerant leaks properly rather than adding refrigerant repeatedly, which can mask a growing leak.

Coil warranties

Many coils carry a parts warranty if the system was registered. Check before paying for the part.

Sources

1. Angi: How Much Does AC Evaporator Coil Replacement Cost? (updated Jul 9, 2026)
2. HomeGuide: How Much Does Evaporator Coil Replacement Cost? (Sep 12, 2025)