So a technician just told you your AC needs a $2,800 repair. Or maybe it's the third repair this year. Or maybe the system is 14 years old, it's been hanging on, and now it's making that noise. And the obvious question is: do I keep paying to fix this thing, or do I just replace it?
This is the question that gets the most dishonest answers in the entire HVAC industry. Some shops will tell every homeowner over 50 they "really need to replace the whole system." Some will keep duct-taping a dying unit together because the repair tickets are easier. Neither is honest. Here's the framework we actually use when a Palm Beach County homeowner calls us for a second opinion — and we dispatch only licensed, insured technicians who are trained to give it to you straight.
The $5,000 rule (the only math that matters)
The most useful rule of thumb in HVAC is sometimes called the "$5,000 rule," and it goes like this: multiply the cost of the repair by the age of the system in years. If that number is over $5,000, lean toward replace. If it's well under, repair.
Example: an 8-year-old system needs a $400 capacitor and contactor job. 8 × 400 = $3,200. Repair, no question.
Another: a 12-year-old system needs a $2,200 compressor. 12 × 2,200 = $26,400. Replace.
And one more: a 6-year-old system needs an $1,800 coil. 6 × 1,800 = $10,800 — but the system is young, so this one's actually a closer call, and you'd want to ask whether the coil failure is covered under the parts warranty most major brands carry for 10 years. (It probably is.)
A simpler version some techs use: if the repair is more than half the cost of replacing the system AND the system is past 10 years old, replace it. Both rules generally land on the same answer.
The age threshold for Florida — and why coastal matters
Manufacturers will tell you AC systems last 15 to 20 years. That number is correct — for inland Ohio. In Palm Beach County, you can chop a few years off the top of that:
- Coastal PBC homes (within ~5 miles of the ocean): 10 to 15 years. Salt air corrodes outdoor coils and electrical contacts shockingly fast. Manalapan, Palm Beach Island, Singer Island, North Palm Beach, parts of Jupiter and Juno Beach — these systems wear out faster, period.
- Inland PBC (Wellington, Royal Palm, Greenacres, Loxahatchee, The Acreage): 15 to 20 years is realistic, especially if the system has been maintained.
If your coastal-PBC AC is past 10 years and it just took a big hit, the calendar is talking to you. If you're in Wellington or further inland with a well-maintained 12-year-old system, you've still got real life left.
R-22 refrigerant — the silent age trap
This one trips up so many homeowners that we have to call it out separately. R-22 refrigerant (sometimes called Freon, which is actually a brand name) was phased out by the EPA. As of 2020, you cannot manufacture or import new R-22. Every AC system installed before 2010 in Florida almost certainly uses R-22.
Here's the practical implication: if your system uses R-22 and you have a refrigerant leak, you have two bad options:
- Recharge with R-22 — possible, but the refrigerant itself now costs roughly $100–$200 per pound and a typical recharge needs 4 to 8 pounds. A simple "top off" can run $800–$1,500 just for the refrigerant.
- Retrofit to R-407C or another drop-in — possible on some systems, but it's a band-aid and reduces efficiency.
So if you're told you need a "refrigerant recharge" on a pre-2010 system, run the $5,000-rule math with R-22 pricing factored in, and the answer often becomes "replace." Modern systems use R-410A (and increasingly R-454B), neither of which has this problem.
The efficiency math: SEER 8 vs. SEER 16 in a Florida home
Now the fun part — the part replacement-pushers love to lean on, but it's actually real. Air conditioner efficiency is measured in SEER (Seasonal Energy Efficiency Ratio). Higher SEER = less electricity for the same cooling. Florida homes run their AC 8 to 9 months a year, so the gap compounds fast.
A typical pre-2006 system installed in PBC is rated around SEER 8 or SEER 10 (and after 15 years of wear, it's probably operating noticeably below that). A new mainstream system today is SEER 16 to SEER 18. In a 1,800–2,400 square-foot PBC home, the difference shows up as:
"In a typical Palm Beach County home, going from a tired SEER 8 system to a new SEER 16 system usually drops the summer electric bill by $60 to $100 a month. Over a 12-month Florida cooling season, that's $700 to $1,200 a year back in your pocket — and it compounds for the life of the system."
That's not the only reason to replace, but it's a real number that belongs in the decision. A $6,500 new system that saves you $900 a year in electricity has effectively paid for itself in roughly 7 years — before you even factor in not paying $2,000+ for another repair on the dying one.
When repair is clearly the right call
Repair, no question, in any of these scenarios:
- The system is under 8 years old and the failure is a normal wear part — capacitor, contactor, fan motor, thermostat, condensate drain.
- The repair is under $1,000 on a system younger than 12 years.
- The failed part is under warranty. Most major brands cover compressors and coils for 10 years on the parts. You may still pay labor, but the part itself should be free.
- You're planning to sell the home in the next 1–3 years. Repairing buys time and lets the next owner choose what they want.
- The system uses R-410A or R-454B (it's post-2010) and is otherwise in good shape.
When replace is clearly the right call
- The system is 15+ years old and has needed any significant repair in the past two years.
- The compressor has failed on a system older than 10 years. The compressor is the heart of the system, and on an older unit, replacing just the compressor is usually throwing good money after bad.
- You have a major refrigerant leak in an R-22 system. See the math above.
- The $5,000 rule says replace. Repair cost × system age > $5,000.
- You've had two or more repairs in the past 12 months. The system is telling you something. Listen.
- Your bills have been creeping up 15–20% year over year for no apparent reason. That's an efficiency-loss signal.
The dishonest sales tactics to watch out for
This is where we have to be specific, because the AC industry has a few classic moves you should recognize on sight:
The 5-minute replacement diagnosis
Any technician who recommends a full system replacement after only a 5-minute visual look — without pulling out gauges, checking the refrigerant pressure, testing the capacitor, measuring the temperature split across the coil, or looking at the actual electrical components — is selling you a system, not diagnosing your problem. A real diagnosis takes 30 to 60 minutes minimum. Period.
The "your compressor is bad" pitch with no proof
A failed compressor is the single most expensive single-component failure on an AC. It's also the most common false diagnosis. Ask the tech to show you the amp draw on the compressor versus the rated amp draw on the nameplate. If they can't or won't, get a second opinion.
The "your system is leaking but we can't find where" recharge loop
If a tech recharges your system and says "we couldn't find the leak, let's see how long this lasts," you're being set up for repeated $400–$1,500 recharges until you finally give in and replace. A proper leak search uses electronic leak detectors, nitrogen pressure tests, or UV dye — and yes, it costs more upfront, but it actually answers the question.
The high-pressure "today only" pricing
Any replacement quote that's "good today only" or comes with "we'll throw in $X if you sign right now" is a sales tactic. Real HVAC contractors will give you a written quote that's valid for 30 days because that's how legitimate businesses operate. A $7,000–$12,000 decision deserves a night to sleep on it.
The wildly oversized recommendation
If someone wants to sell you a system that's significantly larger than what you have now (and your old one was cooling fine when it worked), be skeptical. Oversized AC systems short-cycle, fail to remove humidity, and wear out faster. The right size in a Florida home is usually exactly what you had, possibly half a ton bigger or smaller depending on insulation and window updates.
What an honest second opinion costs
If you've been told you need a replacement and the number gives you that sinking feeling — get a second opinion. A real diagnosis from us is a flat $200 dispatch fee, credited toward any repair you approve. We'll either confirm the original tech was right and explain why, or we'll find the repair the first guy missed and save you five figures. Either way, you walk out of the conversation knowing the truth. See our full pricing breakdown.
And if it turns out the repair is the right call — perfect. We'll dispatch a licensed, insured tech the same day in most cases. Same-day repair is our specialty, and if you're in an emergency situation (no AC, summer, humid), we dispatch 24/7.
Before you make any major decision, you might also want to read our other guide: Why Your AC Stops Working in Florida Heat (And What To Do Right Now). It covers the most common failures and what you can (and can't) check yourself before any technician shows up.
The bottom line
Repair vs. replace isn't a feeling — it's math. Run the $5,000 rule. Factor in the system's age and your coastal/inland location. Account for R-22 if your system predates 2010. Add in the SEER efficiency savings if you're considering replacement. And reject any technician who wants you to make a five-figure decision based on a five-minute look.
If you want a real, honest second opinion from a licensed PBC technician — no pressure, no commission-driven sales pitch, just a diagnosis — call or text 561-340-9057. We'll get a tech to your door, usually the same day, and you'll get the straight answer.