Should you repair or replace your AC compressor?
Updated August 2026
← Every repair-or-replace call
A failed AC compressor is worth replacing on its own only if the system is under 8 years and still on its parts warranty; past 10–12 years, put the money toward a new system instead. The compressor part is $600–1,200, but installed with refrigerant and labor the job runs $1,500–2,800, roughly a third of a full system at $5,000–10,000. On a young unit that ratio favors the repair. On an aging one, you would be dropping serious money into equipment that will need other repairs soon, so a matched changeout is the sounder call.
The short version
The compressor is the heart of the system, and its failure is the classic tipping point. Two things decide it, the warranty and the age. Most compressors carry a 10-year parts warranty, so a unit under 8 years often means you pay only the $1,500–2,800 labor while the part is covered, an easy yes. Once the system is past 10–12 years, that same labor buys you a repaired old unit with an aging coil and condenser, and the 50% math turns against you. One situation is nearly automatic: a burned-out compressor on an R-22 system almost always means replace, because recharging that phased-out refrigerant at $100-plus per pound is throwing money away.
Your situation, decided
| Situation | Verdict | Why |
|---|---|---|
| Under 8 years, compressor under 10-year parts warranty | Repair | Part is covered; you pay $1,500–2,800 labor, not the system |
| 8–10 years, compressor out of warranty | Judgment call | Weigh the $1,500–2,800 repair against a $5,000–10,000 system |
| Past 12 years, compressor failed | Replace | A matched new system beats a big repair on an old coil |
| R-22 system, compressor burned out | Replace | Refrigerant at $100+ per pound makes the old unit a dead end |
| Tripping on a bad capacitor, not truly failed | Repair | A $150–400 capacitor, not a compressor; confirm before you spend |
What each path costs
Repairs typically run $1,500–2,800; a replacement is $5,000–10,000 installed. A compressor carries about a 10-year parts warranty and lasts as long as the system, 12–15 years. Past that, replace the system, not the compressor. Price your own number on the home maintenance cost calculator before you commit either way.
The repair-or-replace call is easy when you know the unit's age and service history. OnOtto keeps both, plus the maintenance that delays this decision for years.
Start your home's service log, freeFrequently asked questions
How do I know the compressor itself failed and not just a capacitor?
Get it confirmed before you authorize a compressor. Many no-cool calls that look like a dead compressor are actually a failed run capacitor, a $150–400 fix, or a bad contactor. A technician can test the capacitor and check whether the compressor is drawing locked-rotor amps or is electrically open or grounded. Only a compressor that is seized, shorted, or open has truly failed. Because the price gap between a $300 capacitor and a $2,000 compressor is enormous, insist on that diagnosis in writing before you agree to the big job.
Is a new compressor covered under warranty?
Often the part is, if the system is young. Most manufacturers warranty the compressor for 10 years to the original owner, sometimes with registration required. That means on a 5-year-old system you may pay only the labor and refrigerant, $1,500–2,800, while the compressor itself is free. Labor is rarely covered, though, which is why even a warrantied compressor is a real bill. Past the 10-year mark the part is out of warranty, and the full charge on an aging unit is what tips most owners toward a new system.
What kills a compressor early?
Heat and strain, mostly. Dirty condenser coils, low refrigerant from an unfixed leak, a failing capacitor that makes the motor labor, and blocked airflow all force the compressor to run hot until it fails. That is why compressor life tracks so closely with maintenance. Keeping the coils clean and the refrigerant correct is the cheapest compressor insurance there is, and it is far less than the $1,500–2,800 a replacement costs. A related failure elsewhere, like a stuck blower motor, can overheat the system too.