Equipment · Read 8 min
AC lifespan: when should you replace your unit?
By the Aircadia team
The lifespan of a properly maintained fixed air conditioner is 12 to 18 years — closer to 10 to 14 years by the sea, where salt air attacks the outdoor unit. Replacement becomes the right call when a repair exceeds 50 % of the price of an equivalent new unit installed, or when the compressor fails on a machine over 12 years old.
Key takeaways
- 12 to 18 years for a maintained fixed split; only 3 to 6 years for a portable air conditioner.
- The rule most refrigeration engineers use: repair > 50 % of the price of a new unit → replace.
- Age alone never justifies replacement: it’s age combined with the type of failure that decides.
- Removal must be done by a professional: ADEME states you should never dismantle an AC yourself, or you release the entire refrigerant charge.
How long does an air conditioner last?
There is no public French statistic on air conditioner longevity. The ranges below come from manufacturer manuals and installer feedback — a trade order of magnitude, not an official study.
| Type of unit | Usual lifespan | Limiting factor |
|---|---|---|
| Fixed split (single or multi-split) | 12 to 18 years | Compressor, corrosion of the outdoor coil |
| Ducted system | 15 to 20 years | Ductwork, fan unit motor |
| Untreated fixed split by the sea | 8 to 12 years | Salt corrosion of the outdoor unit |
| Single-hose portable | 3 to 6 years | Low-end compressor, heavy use |
Three factors matter far more than the brand: installation quality (vacuum pull-down, brazing, mounts), maintenance regularity and usage intensity. In the 06 area, an AC runs 3 to 5 months a year in cooling mode, then often in heating mode in winter: the compressor logs far more hours than it would in northern France.
At what age should you replace your air conditioner?
Age isn’t a verdict, it’s a dial that shifts the payback calculation. Here are the benchmarks we apply on the ground in Nice and across the 06.
| Age of unit | Minor failure (filter, board, fan) | Major failure (compressor, coil leak) |
|---|---|---|
| 0 – 5 years | Repair (often under warranty) | Repair, claim the manufacturer’s warranty |
| 6 – 10 years | Repair | Price both options; repair usually still wins |
| 11 – 15 years | Repair if the part still exists | Replace in most cases |
| 16 years and over | Repair only if under €200 | Replace |
Two things can tip the decision before the theoretical age:
- Spare parts. Before the sale, the seller must tell you whether essential spare parts are available and for how long (article L111-4 of the French Consumer Code). For electrical equipment where that information was never passed on to the seller, the parts are deemed unavailable. On a model over 12 years old, an unobtainable control board makes repair impossible whatever the rest of the machine’s condition.
- The refrigerant. An R410A machine that leaks costs more and more to recharge, since production of new refrigerant is being cut by the F-Gas regulation. Details are in our guide on R410A air conditioning in 2026.
Repair or replace: above what amount does it flip?
The rule most engineers use is the 50 % rule: if the repair quote exceeds half the price of an equivalent new unit installed, replace. In Nice, an installed single split runs €1,500 to €2,500 — so the tipping point sits around €750 to €1,250.
| Failure | Cost in Nice (2026) | Verdict on a unit 12 years and older |
|---|---|---|
| Filter, remote, settings | €79 – €150 | Repair |
| Control board | €250 – €500 | Repair if the part is still made |
| Leak detection + repair + recharge | €300 – €700 | Compare against a replacement quote |
| Compressor | €450 – €800 (up to €1,500) | Replace |
| Outdoor coil pierced by corrosion | €500 – €900 | Replace |
Add the energy saving to that calculation. An old non-Inverter unit runs all-or-nothing; ADEME puts the electricity saving from Inverter technology at up to 30 %. On a €250/year AC bill in Nice, that’s roughly €75 a year back, before counting the jump in energy class. The full calculation is in our guide on the running cost of air conditioning.
What are the signs an AC is reaching end of life?
Taken alone, these symptoms are repairable. Stacked up on a unit over 12 years old, they signal end of life:
- the room takes far longer to reach the set point than it did two years ago;
- the electricity bill rises with no change in usage;
- short cycling: the compressor starts and stops every few minutes;
- new noises — clicking, rumbling, vibration from the outdoor unit;
- a burnt or musty smell that persists after cleaning the filters;
- two or more breakdowns in the same season;
- rust eating through the casing or the outdoor coil.
Before concluding it’s time to replace, rule out the harmless causes: our guide on an AC that no longer cools lists the checks you can run yourself in ten minutes.
Why does an AC age faster in Nice and along the coast?
Because on the Riviera the outdoor unit takes three combined hits: salt spray, which corrodes the aluminium coil and the chassis; intense sunlight, which raises condensing temperature and tires the compressor; and extended use, with the cooling season running from May to October in Nice, Cannes or Antibes.
In seafront towns — Nice, Villefranche-sur-Mer, Beaulieu, Antibes, Cagnes-sur-Mer — a standard unit easily loses 3 to 5 years of life compared with the same model installed in Grasse or Vence. Factory anti-corrosion treatment (Blue Fin, reinforced hydrophilic coating) and rinsing the coil with fresh water once or twice a year narrow the gap considerably: details in our guide on air conditioning in a seafront flat.
”A 10-year-old AC is fit for the scrapheap”: the myth to correct
That’s false, and it’s the favourite line of cold-call salespeople. A 10 to 12-year-old split serviced every year, with no leak and no corrosion, has no reason to be replaced: it will run for several more seasons. Conversely, a 7-year-old unit that was never serviced and whose compressor has failed usually goes for replacement. Age alone decides nothing — it’s age plus type of failure plus the cost of the part.
Two useful points when the time comes:
- Removal is not a DIY job. ADEME is explicit: never dismantle an installation yourself, at the risk of releasing the entire refrigerant charge. Recovering the refrigerant requires an F-Gas capability certificate.
- France’s Repair Bonus does not cover fixed splits. That €15 to €50 subsidy targets domestic refrigerating appliances, including the portable air conditioner — not a fixed system. Many websites get this wrong.
For the old unit, ADEME lists three routes: take-back by the delivery driver if you buy a new one (one-for-one take-back), drop-off at a waste centre in the large refrigerating appliance area, or the town’s bulky-waste service. Abandoning it on the street is a fineable offence.
FAQ — AC lifespan and replacement
Does a 15-year-old air conditioner have to be replaced?
Not automatically. If it cools properly, doesn’t leak, makes no abnormal noise and its consumption is stable, keep it — that’s also the greener choice. That said, at 15 years, any failure costing more than €300 to €400 deserves a replacement quote for comparison, because the odds of a second failure within 24 months become high.
How do I find out what year my air conditioner is?
The year of manufacture is on the rating plate of the outdoor unit, usually encoded in the first characters of the serial number. The refrigerant marking is another reliable clue: R32 became standard in France from 2018-2019 onwards, so an R410A unit is almost certainly older.
Can you replace only the indoor unit of a split?
Rarely. The two units form a matched refrigeration set: capacity, refrigerant and electronics have to correspond. Partial replacement only works between compatible models of the same brand and generation. On a unit over 10 years old, that compatibility generally no longer exists.
Do the refrigerant lines have to be changed when replacing an AC?
Not always, but they must be checked. Switching from R410A to R32 means higher operating pressure: the technician checks the thickness, condition and tightness of the existing copper, then flushes or replaces it according to the manufacturer’s instructions. Reusing lines without checking them is the leading cause of early leaks on a brand-new unit.
Sources
- ADEME, How to choose your air conditioner (in French) — up to 30 % Inverter saving, maintenance duties, ban on dismantling an installation yourself.
- ADEME, What to do with large refrigerating appliances (in French) — WEEE channel, one-for-one take-back, scope of the Repair Bonus (€15 to €50, portable AC included).
- Article L111-4 of the French Consumer Code — information on spare-part availability; parts deemed unavailable where no information is given.
Unsure about the age or condition of your AC in Nice?
Aircadia works in Nice and across the 06. Our F-Gas certified technicians give an honest diagnosis: if your unit is repairable, we repair it — that’s our repair service. If it isn’t, we quote a new installation with removal and recycling of the old unit included. Free quote within 48 h.