How much does evaporator coil replacement cost?
How much does evaporator coil replacement cost?
$1,000 – $2,500 average cost (under warranty)
$2,500 – $4,500+ average cost (not under warranty)
Average evaporator coil replacement cost
Evaporator coil replacement costs $1,000 to $2,500 on average if the unit is still under warranty and $2,500 to $4,500+ if it's no longer under warranty. The total cost of air conditioner coil replacement depends on the AC unit size and brand, the coil type, and local labor rates.
| Warranty status | Average cost* |
|---|---|
| Under warranty | $1,000 – $2,500 |
| Not under warranty | $2,500 – $4,500+ |
*Including parts, labor, and refrigerant
Air conditioner coil replacement cost factors
Several factors affect the cost to replace an evaporator coil, including the system size, coil type, how easy the coil is to access, the brand, and warranty coverage:
Evaporator coil type
Air conditioner coil prices depend on the coil type:
A-coils feature two fins arranged in a triangular A-shape like a tent. A-coils are the most common style used in home air conditioning systems.
N-coils or Z-coils have three fins arranged in an N- or Z-shape. These coils are more efficient due to the extra fin but cost more than A-coils.
Slab coils are arranged in a straight horizontal line and are less common due to their lower efficiency.
Evaporator coils also come in cased and uncased models. Cased coils come in a pre-fit insulated cabinet and are easier to install but cost more than uncased coils. Pros install uncased models inside the ductwork or in the furnace or air handler cabinet.
HVAC coil replacement cost by size
The AC unit's size, measured in tons, also affects the coil replacement cost. The cost of parts and repairs increases with the system size. The table below shows the average cost to replace an evaporator coil for various AC sizes.
| AC unit size | Average cost (parts & labor)* |
|---|---|
| 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+ |
*Total costs depend on the AC system's warranty status.
Brand
Evaporator coil replacement costs more for air conditioners from top brands like Carrier, Lennox, or Trane compared to mid-range brands like Goodman and Bryant. Generic replacement parts sometimes cost less than brand-name parts but may void the manufacturer's warranty.
Warranty
The air conditioner's warranty status has a significant impact on the total cost to replace an evaporator coil. If the unit is still under warranty, the manufacturer covers the cost of the replacement part. However, most manufacturer warranties do not cover labor costs.
Accessibility
Labor costs increase if the evaporator coil is located in an area that's difficult to access, such as inside the air handler in a closet or tight attic space.
Labor cost
AC technicians charge $75 to $150 per hour for labor, depending on the geographic location. HVAC companies in areas with a higher cost of living often charge higher rates.
Many companies charge $75 to $200 for a service call to diagnose the problem, but some companies apply this fee toward the repair costs.
Signs of a bad evaporator coil
If you notice these problems, your evaporator coil might need to be replaced:
Warm air coming from the vents
Frost or ice on the evaporator coil
Air conditioner starts and stops frequently but doesn't cool the home
Leaking near the indoor components
Hissing, banging, or other unusual sounds from the AC unit
AC system does not turn on at all
Refrigerant leaks
A buildup of soot and dust that's blocking airflow
Many of these symptoms may be due to failures in other AC parts that may be cheaper to replace. Have a qualified HVAC technician inspect the system to diagnose the problem.
AC evaporator coil FAQs
What is an evaporator coil?
An AC evaporator coil extracts heat and moisture from the indoor air. As warm air passes over the coils, the refrigerant inside absorbs the heat and carries it outdoors. Refrigerant circulates through the coils continuously to remove heat until the home reaches the desired indoor temperature.
Where is the evaporator coil located?
The evaporator coil is located indoors, usually beneath the blower fan inside the air handler or attached to the furnace in an HVAC system.
How long does it take to replace an evaporator coil?
Replacing an evaporator coil takes 2 to 4 hours, depending on the unit's accessibility. Replacement may take up to 5 to 10 hours for attic and crawlspace units that are difficult to access.
Is it worth replacing an evaporator coil?
Replacing the evaporator coil makes financial sense when the AC unit is less than 8 years old or still under warranty. For newer systems with minimal previous repairs, replacing the coil extends the system's life for much less than the cost of full system replacement.
For older AC units or those with recurring problems, replacing the entire system may provide better long-term value. Newer systems are more energy efficient, cost less to run, and offer comprehensive warranty coverage.
Why do coils freeze on an air conditioner?
There are two main reasons why an AC evaporator coil might freeze: reduced airflow and refrigerant leaks. A dirty air filter or blocked return vents may cause restricted airflow across the coil. If something is blocking the airflow, humidity lingers around the coil and ice will begin to form. A refrigerant leak can also cause the coil to freeze.
Getting estimates from HVAC companies
Follow these tips to help you choose the best AC repair company near you:
Confirm whether the manufacturer's warranty still covers the evaporator coil.
Get itemized estimates from at least three companies to compare.
Read reviews of local AC repair companies on HomeGuide and Google.
Look for a NATE-certified technician with experience repairing air conditioners.
Select companies that are licensed, insured, and have been in business for 5+ years.
Get a detailed estimate, contract, and warranty in writing before the work begins.
Questions to ask HVAC repair technicians
Ask AC repair technicians these questions to ensure you hire a reputable, experienced pro:
How long have you been repairing air conditioners?
Are you licensed and insured?
Are you AHRI or NATE-certified or ACCA accredited?
Do you charge a diagnostic or service call fee? If yes, do you apply that fee to the repair cost?
Is the evaporator coil covered under warranty?
Does the estimate include the replacement part and labor?
What other costs should I expect?
How long will the repairs take?
What warranty do you offer on the new part and labor?
Using our proprietary cost database, in-depth research, and collaboration with industry experts, we deliver accurate, up-to-date pricing and insights you can trust, every time.