If your San Diego AC was installed before 2010, it almost certainly runs on R-22 (the trade name was Freon). That matters in 2026 because R-22 hasn’t been produced in the U.S. since 2020, and the remaining stockpile now sells for $80 to $180 per pound at the wholesale level. A single R-22 leak repair often runs $1,500 to $3,500. Newer systems use R-410A (Puron). And starting in 2025, all new residential AC and heat pump equipment shipped in California uses R-454B. Here’s how to tell what’s in your system and what to do about it.
How to identify your refrigerant in 60 seconds
Walk to your outdoor condenser. There’s a metal data plate (the “nameplate”) on the side of the unit, usually near the electrical disconnect. Look for a line that says “Refrigerant” or “Factory Charge.” It will list one of three things:
- R-22 (sometimes labeled HCFC-22 or sold as Freon). Common on systems installed 2009 or earlier. Some 2010 builders’ systems still used it.
- R-410A (sold as Puron, SUVA 410A, or Forane 410A). The standard from roughly 2010 through 2024 for most San Diego installs.
- R-454B (sold as Opteon XL41 or Solstice 454B). New residential equipment installed in California from January 2025 forward.
If the nameplate is sun-faded and unreadable (common on west-facing condensers in places like Imperial Beach and Pacific Beach), look at the install date on the same plate. Pre-2010 is almost always R-22. 2010 through 2024 is almost always R-410A.
You can also just call us at (442) 777-6440 and we’ll dispatch a tech who’ll confirm in person at no charge.
Why R-22 systems in San Diego usually get replaced, not repaired
The EPA’s Clean Air Act phaseout banned R-22 production and import on January 1, 2020. Existing supply is legal to buy and use; nobody is making more. Six years into the phaseout, supply is thin and prices have climbed sharply.
Real San Diego numbers from 2026:
| Repair scenario | Typical SD cost |
|---|---|
| R-22 top-off (1-2 lbs, no leak fix) | $300 to $600 |
| R-22 leak repair + recharge (small leak, accessible) | $1,500 to $2,500 |
| R-22 evaporator coil replacement + recharge | $2,800 to $4,500 |
| R-22 compressor replacement + recharge | $3,500 to $5,500 |
For context, that compressor number is often within $1,500 of a full system replacement. That’s why our standing rule on R-22 systems is the 5,000 rule: multiply your system’s age by the repair cost. If you get a number over 5,000, replace instead of repair. Almost every R-22 system in San Diego in 2026 fails that test.
A few other things working against R-22 repairs here:
- Refrigerant top-offs are not a fix. A sealed AC system doesn’t “use up” refrigerant. If you’re low, you have a leak. See our guide on the refrigerant leak top-off scam.
- Salt air corrosion accelerates leaks. Coastal homes from Coronado up to Oceanside see evaporator coils pinhole-leak 3 to 5 years faster than inland systems. R-22 coils that survived this long are running on borrowed time.
- Parts availability. Manufacturers stopped making R-22-specific replacement parts years ago. Compressors and coils now require either dry-shipped substitutes or system conversion, both of which add labor.
R-410A in 2026: still the standard, but the clock is running
R-410A (Puron) replaced R-22 starting in the mid-2000s and became the standard for new installs by 2010. If your system is between roughly 2010 and 2024, you almost certainly have R-410A.
Good news for R-410A owners: it’s not banned. Production for service use continues, and prices have stayed reasonable. A typical R-410A recharge in San Diego runs $125 to $250 per pound installed, and most residential systems hold 6 to 12 pounds.
The catch is that the EPA’s AIM Act has set R-410A on a slower phaseout path because of its high global warming potential (GWP of 2,088). New residential AC and heat pump equipment manufactured for sale in the U.S. after January 1, 2025 has to use a refrigerant with GWP under 700. R-410A doesn’t qualify, so manufacturers moved to R-454B (GWP of 466) or, less commonly, R-32.
What that means for a San Diego homeowner with a working R-410A system:
- You can keep using it for the full life of the equipment (typically 12 to 18 years here, less on the coast).
- R-410A refrigerant for service will stay available, but expect prices to climb 10 to 25% per year as production winds down.
- When the system eventually needs replacing, your new equipment will use R-454B. You can’t “drop in” R-454B to an R-410A system. The compressor, line set leak-detection requirements, and pressures are different.
R-454B in 2026: what’s actually different
R-454B is the refrigerant in nearly every new residential AC and heat pump installed in San Diego County from 2025 onward. The performance specs are almost identical to R-410A, so from a homeowner perspective the system cools the same way and runs at similar SEER2 ratings. What changes:
- It’s classified A2L (mildly flammable). The flame propagation is slow and requires high concentration to ignite, but California Title 24 now requires leak-detection sensors in the air handler on R-454B systems. New equipment ships with them built in.
- Charge sizes are smaller. R-454B systems typically hold 5 to 15% less refrigerant than the equivalent R-410A unit for the same cooling capacity.
- Service cost is currently a wash. R-454B refrigerant runs around $150 to $200 per pound at the wholesale level in 2026, similar to R-410A. That’s expected to drop as supply scales up.
- No retrofit path from R-410A. If a contractor offers to “convert” your R-410A system to R-454B, that’s not a real product. You’d be replacing the outdoor unit, the indoor coil, and the line set anyway, which is a full system replacement.
For most homeowners shopping in 2026, this means: don’t avoid R-454B. It’s the standard now, performs as well as R-410A, and qualifies for SDG&E and federal rebates that R-22 and most R-410A systems do not.
Top off, repair, or replace: decision framework
Use this in the order written.
- Is your refrigerant R-22? If yes, default to replace. Get a load calculation (Manual J) and a quote on a new R-454B heat pump or AC. The math almost always favors replacement in San Diego because of the SDG&E heat pump rebate stack plus the federal 25C tax credit.
- Is your refrigerant R-410A and the system under 10 years old? Repair. Find the leak, fix it, recharge. A small accessible leak runs $600 to $1,200 fixed.
- Is your refrigerant R-410A, system 10-plus years old, and the repair quote over $1,500? Run the 5,000 rule. If you’re close to the line, replace. Heat pumps with R-454B qualify for rebates that recover $2,000 to $6,000 of the install cost.
- Did a tech recommend a “top-off” without finding the leak? Get a second opinion. That’s the most common AC scam in San Diego. See our scam-avoidance guide.
San Diego-specific factors most generic articles miss
A few things national content gets wrong about R-22 and replacement decisions for SD homeowners:
- Heat load is lower here. A house that needs a 4-ton AC in Phoenix often runs fine on a 2.5-ton heat pump in San Diego. When replacing an R-22 system, get a real Manual J load calculation before sizing the replacement. Most R-22 systems were oversized to begin with.
- Heat pumps now outperform straight AC for SD. With our mild winters, a heat pump replaces both your AC and your gas furnace and qualifies for stacked rebates. See heat pump vs gas furnace cost.
- Coastal corrosion changes the equation. If you’re within 2 miles of the coast and considering a $3,000 R-22 repair on a 15-year-old system, factor in that the new coil you install will likely pinhole-leak again within 5-7 years from salt exposure. The replacement system can be spec’d with coated coils that last twice as long.
- Permit and inspection costs. A full AC or heat pump replacement in unincorporated SD County or any of the 18 incorporated cities requires a mechanical permit. Budget $250 to $500 for the permit and inspection on top of the install. See our HVAC permit guide.
FAQ
Is R-22 illegal in 2026?
No. Using R-22 in existing equipment is legal. What’s illegal under the Clean Air Act is producing or importing new R-22 (banned since January 1, 2020) and venting any refrigerant to the atmosphere. Existing stockpiles can still be sold and used to service older systems.
Can I convert my R-22 AC to R-410A or R-454B?
Not practically. The compressor, expansion valve, line set, and indoor coil are all designed for a specific refrigerant. A real “conversion” means replacing nearly every component, which costs more than a new system install. Anyone offering a cheap R-22 conversion is either misinformed or running a scam.
Why is Freon so expensive now?
“Freon” is the brand name for R-22, which is no longer manufactured in the U.S. The remaining supply was made in or before 2019. As stocks deplete, wholesale prices have moved from around $10 per pound in 2015 to $80 to $180 per pound in 2026. Some San Diego supply houses are quoting over $200 per pound for small quantities.
What’s the difference between Freon and Puron?
Freon is the DuPont brand name for R-22. Puron is the Carrier brand name for R-410A. They’re different chemicals with different operating pressures and oils, not interchangeable. R-410A (Puron) systems typically operate at about 50% higher pressures than R-22 systems.
Does R-454B require new copper line sets?
Sometimes. In a new install, yes, the line set is sized and pressure-tested for R-454B. In some retrofit scenarios (R-410A condenser replaced with an R-454B condenser of similar capacity), a contractor may be able to reuse properly flushed line sets, but most manufacturers’ warranties require new lines. Ask before agreeing to reuse the existing copper.
My tech says I need 4 pounds of R-22 at $300 per pound. Is that fair?
That’s at the high end but not necessarily a scam if the supply house actually charged that. What’s a red flag is the recharge without a leak repair quoted alongside it. Refrigerant doesn’t disappear unless there’s a leak. If the repair quote is just “recharge” and no diagnostic, get a second opinion before paying.
When to call
If your system is 12-plus years old and the tech is quoting any refrigerant work over $1,500, get a free replacement quote before approving the repair. We dispatch licensed local pros across San Diego County who’ll give you both numbers (repair and replace) so you can run the 5,000 rule yourself.
Call (442) 777-6440 for a free estimate, or read our AC repair vs replace decision guide for more on running the numbers.