Buying a second-hand AC in India: what to check before you pay

Updated August 29, 2026 · Claude AC · 2 sources cited

Contents (8)

What you are actually buying
The refrigerant question: check the nameplate
The star rating trap
The twenty-minute inspection
The costs after the price
When it makes sense — and when it does not
A sane way to think about price
Frequently asked questions

A used split AC changing hands for a fraction of a new one is one of the most tempting purchases in an Indian summer — and one of the easiest to get wrong, because everything that decides whether it was a bargain is invisible on the day you pay. The seller demonstrates a machine bolted to a wall in a cool morning room; you take delivery of a dismantled unit that must be re-installed, re-charged and then asked to hold a room at 45 °C.

What you are actually buying

Three things carry almost all the value, and none of them is the plastic front panel that buyers tend to inspect.

The compressor. It is the expensive component and the one that decides how many summers remain. A compressor that starts smoothly, runs without knocking and holds a steady temperature split is the single strongest signal available to a non-specialist.
The coils. Corroded fins on an outdoor unit that has spent years in coastal or industrial air are a slow leak waiting to happen, and coil replacement rarely makes economic sense on a used machine.
The refrigerant it uses. This determines whether servicing it in five years will be routine or awkward — see the next section.

Warranty is generally not part of the deal: manufacturer cover in India is normally tied to the original invoice, and the long compressor warranties advertised on new machines are rarely transferable. Assume you are buying without cover.

The refrigerant question: check the nameplate

Every unit carries a nameplate on the outdoor casing stating the refrigerant. Three matter in the Indian market.

Refrigerant	Typical vintage	What it means for a used buyer
R-22	Older machines	An HCFC being phased out under the Montreal Protocol. New room ACs using it have not been made in India for years, and servicing supply narrows on a published schedule — expect rising cost and falling availability over the machine’s remaining life
R-410A	Middle generation	Widely serviced today, but a high-GWP blend that the industry is steadily moving away from
R-32	Most recent	The current mainstream choice in India; readily available and lower-GWP

An R-22 machine is not unusable: if it is cheap enough and you need cooling for two or three seasons, it can still be a rational purchase. What it is not is a long-term asset, and the price should reflect that. Note also that refrigerants are not interchangeable — a seller who claims the machine was “converted” deserves detailed questions.

The star rating trap

A used machine advertised as “5 star” is quoting the label it earned when it was sold, and BEE periodically revises the thresholds so that the same equipment slips down the scale as the market improves. A five-star unit from an older table can perform like a low-star machine under today’s. That matters far more than the purchase saving, because an air conditioner’s running cost accumulates every month it is switched on.

Do that arithmetic before you buy. A machine drawing meaningfully more power for the same cooling, run several hours a day through an Indian summer, can erase the entire second-hand discount within two or three seasons — the method for estimating it in units and rupees is in our guide to what an AC adds to an Indian electricity bill, and the label itself is decoded in our guide to BEE star ratings and ISEER.

The twenty-minute inspection

Insist on seeing the unit running, installed, before it leaves the seller’s wall. A machine already dismantled and lying in a corner cannot be tested at all, and should be priced accordingly — or refused.

Let it run for at least fifteen minutes, then measure the difference between the air entering the indoor unit and the air leaving it. Roughly 8 to 12 °C indicates a healthy circuit.
Listen at the outdoor unit. A steady hum is normal; knocking, rattling or a compressor that repeatedly starts and stops within a few minutes is not.
Look for oil. Oily film around the flare joints or service valves is the classic signature of a slow refrigerant leak.
Inspect the outdoor coil fins for white powdery corrosion, flattened areas or patches of green. Coastal and roadside units age fastest here.
Check the indoor blower and drain for black mould and water staining, which suggest years without cleaning and often a musty smell you will not remove easily.
Ask for the model number and manufacturing year from the nameplate, then look them up. A vague answer about age is itself information.
Ask why it is being sold. A house move or an upgrade in tonnage is a good answer; “it just needs a gas refill” means you are buying a known leak.

The costs after the price

The number agreed with the seller is rarely the number you spend. Budget separately for uninstallation, transport, a fresh installation kit — copper piping, drain pipe, brackets and stand — core cutting if the wall needs it, and very often a refrigerant top-up, since a circuit opened for a move usually needs recharging. On an older machine those items together can turn an apparently excellent deal into an ordinary one. Our guide to AC installation charges in India sets out the standard kit and the usual extras.

When it makes sense — and when it does not

Reasonable: a rented flat you will leave in a year or two; a guest room used a few weeks a year; a recent R-32 machine sold because the household upgraded tonnage; a window unit, which is simpler to move and has fewer joints to leak.
Questionable: the main bedroom of a home you own, where the machine will run several hours a night for years and where efficiency compounds; any unit sold as “only needs gas”; anything that cannot be tested running.
Consider the alternative: in genuinely dry inland heat, a good evaporative cooler costs a fraction of even a used AC and runs on a fraction of the electricity. Whether it suits your city’s humidity is the whole subject of our air cooler versus AC comparison — the verdict is very different in Jaipur and in Chennai.

A sane way to think about price

Rather than hunting for a market rate that does not exist, reason from depreciation. A room AC has a useful life of roughly a decade with decent maintenance, so a machine that has used half of that should be worth appreciably less than half of a comparable new unit once you account for the absent warranty and the reinstallation you will pay for. Adjust downward for R-22, for corroded coils, for a unit that cannot be demonstrated running and for any hint of a leak; adjust upward only for a recent R-32 machine with a verifiable purchase date. Used values move with the season, the city and how urgently the seller wants the wall space back, so treat any figure quoted online as an indicative band rather than a price list.

Frequently asked questions

How many years does a second-hand AC last?

A well-maintained room AC gives roughly a decade of service, so a five-year-old machine that tests well may reasonably have several summers left. Neglected units — dust-caked coils, never serviced, coastal corrosion — can fail much sooner, which is why the physical inspection matters more than the stated age.

Is the compressor warranty transferable to me?

Usually not. Manufacturer warranties in India are generally tied to the original buyer’s invoice, and the extended compressor cover advertised on new machines rarely follows the equipment to a second owner. Confirm directly with the brand’s customer service if it is decisive for you, and price the machine as uncovered otherwise.

Should I avoid an R-22 air conditioner completely?

Not necessarily, but treat it as a short-horizon purchase. R-22 is being phased out under the Montreal Protocol, so servicing it will get harder and dearer over the machine’s remaining life. If the price reflects that and you need two or three seasons of cooling, it can still be a reasonable buy; as a long-term installation in a home you own, it is not.

The seller says it only needs a gas refill. Is that a small job?

It means there is a leak, because the circuit is sealed and does not consume refrigerant. The refill itself is modest; finding and repairing the leak may not be, and a machine refilled without repair will be flat again within a season. Our guide to AC gas refilling explains what a proper leak test looks like.

Can I move a split AC myself to save money?

Uninstalling a split correctly requires pumping the refrigerant down into the outdoor unit before the pipes are disconnected, which needs gauges and experience. Done wrong, the charge vents to atmosphere and you pay for a full recharge — and moisture entering an open circuit can damage the compressor. This is one of the places where a competent technician is cheaper than doing it yourself.