AC repair cost, from a capacitor to a compressor
A small part and a big part can cause the same warm air. Here is which AC repairs are quick, which approach the price of a new system, and how to decide.
Updated September 2026 by the Air Cove HVAC team
Most AC repairs are one failed part, and the price depends on which part it is.
A worn capacitor and a failed compressor can both leave you with warm air and a humming outdoor unit. One is a small part and a short visit. The other is the most expensive part in the system. That is why we find the fault before we give you a price.
We cover homes across Los Angeles, and every repair we quote starts with a diagnosis. You get the fault in plain words and the price before any work starts. Our AC repair page explains what we check on the visit.
Small repairs and big ones
This is how common AC repairs compare. We price each one after we have found it. Once the part is known, the size of the job is clear.
| Repair | Size of the job | What moves the price |
|---|---|---|
| Capacitor or contactor | Small | The part itself and how easy the panel is to reach |
| Clogged condensate drain | Small | Whether a pump or a float switch also needs replacing |
| Thermostat or low-voltage wiring | Small | Whether the thermostat is replaced or rewired |
| Outdoor fan motor or indoor blower motor | Medium | The motor type, and whether it is a standard or variable-speed motor |
| Refrigerant leak | Medium to large | Where the leak is, how long it takes to find and whether a coil or line must be replaced |
| Evaporator coil | Large | Access to the indoor unit and matching the coil to the system |
| Compressor | Largest | The compressor size, the refrigerant work and the age of the rest of the system |
We find what failed first, and the repair is priced once we know.
What an AC compressor replacement costs, and why
The compressor is the pump in the outdoor unit that moves refrigerant through the system. When it fails, the whole system stops cooling. Replacing it is the biggest repair an air conditioner can need, for a few reasons.
- The part. Compressors are sized to the system, and a bigger system has a bigger, costlier compressor.
- The refrigerant work. We recover the refrigerant, cut out the old compressor, braze in the new one, replace the filter drier, pull a deep vacuum and recharge the system. Handling refrigerant needs EPA certification, and it takes time to do properly.
- Why it failed. A compressor rarely fails on its own. A weak capacitor, a dirty coil, low refrigerant or a burnout that left acid in the lines can all be the cause. If the cause is not fixed, the new compressor can fail too.
- The rest of the system. A new compressor in a system with a tired coil, a worn fan motor and leaking ducts is money spent on one good part in an old machine.
A compressor replacement on a younger system can make good sense. On an older system, it is usually the point where we price replacement alongside the repair, so you can compare.
The R-410A question
Most systems installed before 2025 run on R-410A. New equipment made since then mainly uses R-454B or R-32. We can still repair and recharge an R-410A system with R-410A, and we do.
What changes is the math on a big repair. A compressor or coil replacement on an R-410A system keeps an older system running on the older refrigerant. A replacement puts you on current equipment. For a young system that is fine. For a system past ten years with a big refrigerant repair ahead, it is worth pricing both before you choose.
Why the answer is different in Los Angeles
Heat is hard on parts. In the inland valleys, from Woodland Hills and Van Nuys to Sylmar and Santa Clarita, air conditioners run long afternoons for months. Capacitors, contactors and fan motors work harder there, and they wear out sooner than they do on the coast.
The cost of the other choice is also different here. If you compare a big repair with a replacement, the replacement price includes a mechanical permit from your city's building department and usually an independent Title 24 HERS test of the ducts and, depending on your climate zone, the refrigerant charge. A fair comparison puts the full replacement cost next to the repair, not just the price of the equipment.
Deciding between repair and replacement
A common rule of thumb is a quick way to start. Multiply the age of the system in years by the repair price. If the answer is above 5,000, replacement is usually worth pricing. A ten-year-old system with a small repair passes easily. The same system with a compressor replacement usually does not.
We use it as a starting point, then look at the things the rule leaves out:
- How old the system is, and how many repairs it has needed lately.
- What refrigerant it uses.
- The condition of the coil, the fan motors and the ducts.
- Whether the system keeps the house comfortable on the hottest afternoons.
If the repair makes sense, we make it. If replacement is the better answer, our page on AC installation and replacement explains what that involves. Our guide to how long an AC unit lasts covers the signs a system is near the end. When you are ready to have it looked at, our AC repair page is the place to start.
AC repair cost questions
What is the average cost of an AC service call?
It depends on what the call finds. We find the fault first and tell you what the repair costs before we start. We tell you what the repair costs before we do it, so you can decide.
What is the $5000 rule for AC?
It is a rule of thumb for repair or replace. Multiply the age of the system in years by the repair price. If the result is above 5,000, replacing the system is usually worth pricing. We use it as a starting point, then look at the refrigerant, the condition of the rest of the system and how well it keeps up.
Is it worth replacing the compressor on an old AC?
On a young system, often yes. On an older R-410A system, the compressor can cost a large share of a new system, and the rest of the machine is just as old. We price both so you can compare them side by side.
Not sure whether to repair or replace? Tell us what the system is doing and how old it is.
Find out what it really needs
Call us, or send the form and we will call you back. We work across Los Angeles, seven days a week.