AC compressor replacement cost
Replacing a central AC compressor costs $1,800 to $2,800 out of warranty, about $2,300 on average. If the compressor is still under the manufacturer's warranty, you'll usually pay $600 to $1,200 for labor and refrigerant.
Quick answer
$1,800 – $2,800out of warranty, parts and labor
Most compressor replacements cost $1,800 to $2,800. Under warranty, expect $600 to $1,200; large units or old R-22 systems can exceed $5,000.
Cost by AC size
| AC size (tons) | Replacement cost |
|---|---|
| 1.5 | $1,500 – $2,000 |
| 2 – 2.5 | $1,800 – $2,200 |
| 3 – 3.5 | $2,000 – $2,600 |
| 4 – 4.5 | $2,200 – $2,800 |
| 5+ | $2,500 – $3,500+ |
Compressors can't be repaired in the field; when the motor inside fails, the whole compressor is replaced, the system is evacuated and recharged, and a new filter drier is installed.
Rule out cheaper problems first
| Repair | Cost |
|---|---|
| Hard start kit (helps a struggling compressor start) | $100 – $270 |
| Capacitor | $100 – $400 |
| Contactor | $200 – $450 |
| Inspection to confirm compressor failure | $150 – $500 |
A failed capacitor or contactor can make a compressor seem dead. Ask the technician to confirm the diagnosis with electrical readings before quoting a compressor.
Compressor or whole new AC?
A compressor is the most expensive part of an AC. Replace the whole outdoor unit (and coil) instead if:
- The AC is more than 10 years old or out of warranty.
- It uses R-22 refrigerant, which can push compressor jobs past $5,000.
- The quote is more than about half the cost of a new AC ($5,000 to $8,300 installed).
See AC replacement cost.
How to get a fair quote
- Get at least three written quotes that list the brand, model number, size (tons or BTU) and efficiency rating.
- Ask whether the price includes permits, removal of the old unit, refrigerant, a new thermostat and any duct or electrical work.
- Ask for a load calculation (Manual J) instead of matching the old unit's size by default.
- Compare labor warranties (1 to 10 years) as well as the manufacturer's parts warranty, and register the equipment.
- Schedule non-urgent work in spring or fall, when contractors are less busy and more willing to discount.
Frequently asked questions
How much does it cost to replace an AC compressor?
About $1,800 to $2,800 out of warranty, with an average near $2,300. Under warranty, $600 to $1,200.
Is it worth replacing the compressor on a 10-year-old AC?
Usually not. At that age, replacing the outdoor unit and coil costs more but comes with a new warranty and better efficiency.
How long does a compressor replacement take?
Typically 4 to 8 hours, including recovering and recharging refrigerant.
Sources
Prices are national averages and typical ranges from published cost data. Your price depends on your home, region, equipment and contractor, so get several written quotes. Heat & Air Costs is not an HVAC contractor; read our disclaimer.