The quick answer
Quick answer
Repair wins for younger systems with minor faults — capacitors, contactors, fan motors. Replacement wins when the unit is 12–15+ years old and the failure is major, especially a compressor or refrigerant-circuit fault on an R-410A system, where the refrigerant phase-down quietly raises the cost of every future fix. In the gray zone, apply the 50% rule and check the furnace's age too — combo replacements are where package value lives.
- Cheap, common fixes (capacitors, contactors) are almost always worth doing at any age; they're the low end of our $150–$2,200+ repair range.
- Compressors and refrigerant leaks are the high end — and on an aging R-410A unit they're usually the exit sign, not a repair.
- The refrigerant wrinkle: new systems now ship on A2L refrigerants (R-454B/R-32), while R-410A supply is being phased down — recharging an old leaky system gets steadily more expensive.
- If your furnace is also 15+, price the combo ($5,400–$16,000+) before replacing the AC alone — one crew, one permit, matched equipment.
- A dead AC in a Wisconsin July is miserable but survivable — which means you have time to get a second opinion. Use it; ours is free.
The decision factors
The failed component's tier
Consumables (capacitor, contactor, fan motor) — repair. Mid-tier (blower motor, board, coil cleaning-level issues) — repair if young, judgment if old. Terminal (compressor, evaporator/condenser coil leak) — replacement conversation on anything past its first decade.
Refrigerant type and leak status
A leak isn't a one-time cost; it's a subscription. On R-410A, that subscription's price rises as production caps bite. A slow leak on a 14-year-old unit is the textbook case for putting the recharge money toward new equipment instead.
Age against the 12–15 year Wisconsin norm
Our climate is actually gentle on AC lifespans — short seasons mean fewer run hours than southern units. But parts availability and refrigerant economics age a unit even when its hours are low.
The furnace next to it
AC and furnace share the blower and often the install crew. If both are old, the combo replacement is meaningfully better value than two separate projects two years apart — and gets you a properly matched system.
Repair the AC vs Replace the AC
| Situation | Repair leans right | Replacement leans right |
|---|---|---|
| System age | Under ~10 years | Over ~12–15 years |
| The failure | Capacitor, contactor, fan motor | Compressor or a leaking coil |
| Refrigerant situation | Holds charge; no leak history | R-410A unit needing recharges |
| Repair cost vs new | Small fraction of replacement | Approaching 50% of replacement |
| The furnace | Newer — no combo angle | Also aging — price the combo |
| Comfort & bills | Cools evenly, bills fine | Struggles on hot days, humidity complaints |
The 2026 refrigerant wrinkle, in plain Wisconsin terms
For years the repair-or-replace call was pure age-and-cost math. The EPA's refrigerant transition added a thumb on the scale: new equipment ships on A2L refrigerants (R-454B, R-32), and R-410A production is stepping down under federal phase-down schedules. Nobody is confiscating your R-410A unit — it's legal to run and service indefinitely — but every recharge on a leaky system gets pricier, and major refrigerant-circuit repairs on old units make less sense each season. That's not a scare tactic; it's supply and demand with a compliance calendar.
Wisconsin's short season cuts the other way, honestly: our AC units accumulate hours slowly, so a well-maintained 12-year-old unit here can be healthier than an 8-year-old unit down south. That's why we diagnose before we prescribe — a $169 tune-up-level inspection with real measurements tells you what the machine actually has left. And if another company already told you it's dead, our free second opinion will confirm it or catch it, line by line.
The honest numbers
The three published planning ranges this decision moves between.
| Option | Planning range | What that covers |
|---|---|---|
| AC repair | $150–$2,200+ | Diagnostic, parts, labor — capacitors and contactors low end, compressors high end. Refrigerant-leak and compressor jobs can push past the top. |
| Central AC replacement | $8,400–$12,400 | New condenser + coil matched to your furnace, with permit. |
| Furnace + AC combo | $5,400–$16,000+ | Both systems in one install — the right comparison when the furnace is old too. |
Dollar ranges come straight from our published Instant Pricing tool (SE-Wisconsin planning ranges — see the homepage pricing section and Terms §3). Ballparks only, never a quote: your home's specifics set the real number, in writing, before any work begins.
Which one should you choose?
Repair the AC
Repair it when
The unit is younger, the fault is a normal wear part, and the refrigerant circuit is tight. Most summer breakdowns are exactly this — a $200 part and an afternoon, and On The Dot Club members take 20% off the repair with a $0 service fee.
Replace the AC
Replace it when
Age plus a major fault says so, a leak has turned refrigerant into a recurring bill, or the furnace is due too and the combo consolidates the pain into one well-priced project. Replacement is also when SEER2 tier, staging, and even a heat-pump-instead-of-AC conversation open up — decide with the menu in front of you.
Also consider: replacing the AC with a heat pump
If you're replacing the outdoor unit anyway and your furnace is compatible, a heat pump costs somewhat more than a like-for-like AC but adds efficient shoulder-season heating — instant dual-fuel. See the dual-fuel comparison; it's the upgrade path most worth knowing exists before you sign an AC-only quote.
Ready when you are
Get the answer for your house.
Both options priced in writing, sized to your home, explained without a pitch — 24/7, owner-operated, licensed (WI #1482483). Already have someone else's quote? We'll review it for free.
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Next steps
Honest answers, before you decide
My AC needs refrigerant every summer. Is that a repair?
Needing refrigerant IS the symptom of a leak — refrigerant doesn't get used up like fuel. The honest fix is finding and repairing the leak, and the honest conversation on an older R-410A unit is whether that money belongs in new equipment instead. Annual top-offs are the most expensive way to avoid the decision.
Can I replace just the outdoor unit to save money?
Mismatched coil-and-condenser pairings lose efficiency, can void warranties, and — across the refrigerant transition — often aren't even compatible (an R-410A coil can't take an R-454B condenser). Sometimes a matched partial replacement is legitimate; we'll tell you when it is and when it's a false economy.
Is it worth repairing before selling the house?
Usually yes at the consumable level — a working AC keeps the inspection clean and the sale smooth, and a cheap fix beats a price concession. A major repair for someone else's benefit rarely pays back; disclose honestly and price accordingly instead. We'll give you the straight version for your specific situation.
Reviewed by Shane Herro, Owner & Lead Tech · Last updated 2026-07-14