Repair your AC if it's under roughly 10–12 years old and the fix is small relative to a new system. Lean toward replacement when it's 12–17+ years old, a repair approaches about half the cost of replacing, it still uses phased-out R-22 refrigerant, or it's failed repeatedly. When it's genuinely a close call, a free in-home diagnosis — showing you the actual failed part — beats any phone guess.
What's the quick decision framework?
Three questions answer most of it:
- How old is it? Central AC and heat pumps typically last 12–18 years. Past that, you're maintaining borrowed time.
- How big is the repair vs. replacement? A common rule of thumb: if one repair costs roughly half of a new system — and the unit is older — replacing usually wins.
- What refrigerant does it use? An R-22 system facing a refrigerant leak is expensive to keep alive and worth replacing.
When is repair clearly the right call?
If your system is newer and the failure is a capacitor, contactor, fan motor, or a clogged condensate line, repair is almost always the better money. These are normal wear items, the parts are available, and fixing them gets you many more years. Staying current on maintenance — see how often to service your HVAC — is what keeps small repairs small.
When does replacement make more sense?
- The system is 12–17+ years old and a major component (compressor, coil) has failed.
- A single repair is approaching half the cost of new equipment.
- It uses R-22 and needs refrigerant — you'd be paying premium prices to refill a system on borrowed time.
- Bills keep climbing and comfort keeps slipping despite repairs.
- You're ready to add efficiency or cooling-and-heating in one — a good moment to compare a heat pump vs. furnace.
A failure to watch for: a technician who "condemns" your system without showing you the failed part or a reading. A fair diagnosis is evidence-based. If a quote only offers the premium replacement and applies same-day pressure, slow down — that's exactly what comparing quotes protects you from.
What will replacement cost if you go that way?
Rather than invent a number, we publish ranges and explain what moves them in the AC & heat-pump installation cost guide. The honest figure for your home comes from a free in-home estimate that accounts for your ductwork, electrical, and sizing.
Why homeowners trust Air Synergy here
We're family-owned with decades of combined technician experience in the Bay Area and a 4.9-star rating across 189 reviews, and we offer Emergency Service Available, Mon–Fri 8–5 when an AC quits in a heat wave. Because we both repair and install, we have no incentive to push a replacement you don't need — we show you the evidence and let it lead. See heating & cooling services.
Your next step
Not sure which way to go? Book a free, no-pressure diagnosis. We'll show you what's wrong, lay out repair and replacement side by side, and let you decide.
Refrigerant and equipment terms defined in the glossary. Lifespan and repair-vs-replace thresholds are common industry rules of thumb, not guarantees. Cost ranges in the cost guides. Company facts per Air Synergy.
Common questions
When should I replace my AC instead of repairing it?
Lean toward replacement when the system is over about 12–15 years old, a single repair approaches half the cost of a new system, or it still uses R-22 refrigerant. If it's newer and the fix is minor, repair is usually the smarter money.
Why does R-22 refrigerant change the decision?
R-22 is no longer produced, so recharging an R-22 system after a leak is increasingly expensive and is only a temporary fix. If your unit uses R-22 and needs refrigerant work, that often tips an older system toward replacement.
Can a tune-up tell me whether to repair or replace?
Yes. A licensed diagnosis shows you the failed part, the refrigerant type, and the system's real condition, so the decision is based on evidence — not a salesperson condemning the unit without showing you anything.