Whether to repair or replace an air conditioner in San Leandro usually comes down to five things: how old the system is, what the repair costs compared with a new system, which refrigerant it uses, how efficient it is and how often it has broken down. A failed capacitor on an eight-year-old system is an easy repair. A failed compressor on an eighteen-year-old system that runs on R-22 is almost always a replacement conversation. Most cases fall somewhere in between, and that is where the details matter.
The short answer
Our general guidance, offered as a rule of thumb rather than a hard rule:
- Repair when the system is under 10 years old and the problem is a single failed part.
- Replace when the system is over 15 years old, uses R-22 refrigerant, or needs a repair that costs more than half the price of a new system.
- Between 10 and 15 years, look closely at the specific repair, the system’s history and how well it cooled before it failed.
A central air conditioner typically lasts 15 to 20 years. Maintenance, installation quality and how hard the system works all move that number, so the age is a starting point, not a verdict.
The five factors, one by one
| Factor | Leans toward repair | Leans toward replacement |
|---|---|---|
| Age | Under 10 years | Over 15 years, or over 10 with a major failure |
| Repair cost | A small share of a new system | More than about half of a new system |
| Refrigerant | R-410A | R-22 (Freon) with a leak |
| Efficiency | Cools well, bills steady | 10 SEER or lower, rising bills |
| Breakdowns | First problem in years | Several calls a year |
Age
Systems under 10 years old are usually worth repairing: the major components have plenty of life left and parts are easy to get. Past 10 years, a major repair such as a compressor or a coil starts to compete with the cost of new equipment, because everything else in the system is aging too.
Repair cost compared with replacement
The common rule of thumb is the 50% rule: if a repair costs more than half of what a new system would, replacement usually makes more financial sense. We add one question to it: what is the next likely repair? A new fan motor on a system whose compressor is already struggling only buys time. You get the repair price before any work starts, so you can put it next to an installation quote and compare real numbers.
Refrigerant type
Look at the data plate on the outdoor unit. If it says R-22, the system uses a refrigerant that is no longer produced in the United States; production and import ended in 2020, and what is left comes from recovered and stored supply. Recharging an R-22 system is expensive, and because refrigerant only runs low when there is a leak, the cost comes back. An R-22 system with a leak is the clearest replacement signal we see. Systems on R-410A cost far less to service and are usually worth repairing.
Efficiency
Older systems are often rated 10 SEER or lower. Today’s equipment is rated under the newer SEER2 test, and even base models use noticeably less electricity for the same cooling. Be realistic about the payback, though: near the bay an air conditioner runs far fewer hours a year than it would in a hot inland climate, so efficiency alone rarely justifies replacing a system that works. It is a strong extra reason when the other factors already point to replacement.
Breakdown history
If you are calling for repairs more than once a year, the bills, the inconvenience and the hot afternoons without cooling add up. A new system starts over with the manufacturer’s parts warranty.
Repairs that are usually worth doing
- Capacitor or contactor. The most common reasons an outdoor unit stops; usually fixed in one visit.
- Outdoor fan motor. A wear part. Its failure does not mean the rest of the system is failing.
- Clogged condensate drain or tripped float switch. Cleaning and a check, not new equipment.
- Thermostat or wiring faults. These often look like a dead air conditioner.
- A small, reachable leak on an R-410A system, properly repaired and recharged.
Our AC repair cost guide gives typical prices for each of these.
Repairs that usually start the replacement conversation
- Compressor failure on a system over 10 years old. The compressor is the most expensive part of the system.
- An evaporator coil leak on an older system, especially one that uses R-22.
- Repeated refrigerant leaks in different places.
- A system that never kept up, even after the airflow, ducts and charge were checked. That points to sizing or ductwork, and replacing it like-for-like would not fix the problem.
How to find your system’s age and refrigerant
The data plate on the side of the outdoor unit lists the model number, the serial number and the refrigerant type. Most manufacturers encode the year of manufacture in the serial number, but the format varies by brand; the technician can read it for you during the visit. Keep in mind that the indoor coil and the furnace may be a different age from the outdoor unit if parts were replaced over the years.
If you replace: what to get right
- Matched equipment. The outdoor unit and the indoor coil are designed and rated as a pair. A new outdoor unit is not built to run on an old R-22 coil, so replacing an older system usually includes the coil.
- Sizing. The new system should be sized from a load calculation for your home, not copied from the old unit. Many systems were sized decades ago, before window, insulation or room changes.
- Ducts. In post-war homes with attic or crawlspace ductwork, leaky or crushed ducts waste part of what a new system delivers. Check them as part of the job; see duct repair.
- Whether a heat pump makes more sense. If the furnace is old too, one heat pump can replace both. For rooms the ducts never reached, a mini-split is another option.
We handle the replacement itself through AC installation, and financing is available for installations and replacements.
How we help you decide
The technician diagnoses the system first, then tells you what failed, what the repair costs and what it means for the rest of the equipment. If a repair makes sense, you get the price before work begins, the diagnostic fee is waived when you go ahead, and the repair carries a 90-day warranty. If replacement makes more sense, you hear that too, with the reasons in plain words. For heating equipment, the same decision is covered in furnace repair vs replacement.