When new air conditioners are sold out or pricey in a heatwave, a second-hand unit is tempting. Sometimes it's a smart saving; sometimes it's a costly gamble. Here's how to decide between used and new.
The appeal of second-hand
A used mobile AC can cost noticeably less than new, and during a heatwave — when new units are sold out — the second-hand market may have stock when shops don't. For a budget buyer, or someone who's missed the new-stock window, a good used unit can be a genuine win: the same cooling for less money, available now. The key word is good — and that takes checking.
The risks of buying used
Second-hand cooling carries real downsides:
- No warranty — if it fails, that's your problem.
- Unknown wear — compressors and fans degrade; a cheap unit may be near the end of its life.
- Hidden faults — weak cooling, error codes, or noise you can't see in a photo.
- Missing accessories — without the exhaust hose and window sealing kit, the unit won't work and replacements are a hassle.
These risks are why a "bargain" can become a disappointment.
What to check before buying used
If you go second-hand, protect yourself:
- See it running — confirm it actually cools, runs without excessive noise or rattle, and shows no error codes. Never buy an AC you can't test.
- Check the accessories — make sure the hose and window kit are included.
- Inspect condition — look at the filter and general wear; a clean, cared-for unit is a better bet (see our maintenance guide).
- Ask why it's being sold — and judge whether the answer is reassuring.
- Make the price reflect the risk — a used unit should be enough cheaper to justify the lack of warranty.
When new is the better choice
For most people who value reliability and peace of mind, a new unit is the safer bet. It comes with a warranty, full accessories, known condition, and return options if something's wrong — protections a used unit can't offer. If your budget allows and stock is available, a correctly sized new unit avoids the gamble entirely. Check what's in stock new near you.
The honest verdict
| Second-hand | New | |
|---|---|---|
| Price | Lower | Higher |
| Warranty | None | Yes |
| Condition | Unknown | Known |
| Availability in heatwave | Sometimes better | Often sold out |
| Risk | Higher | Lower |
The takeaway
A second-hand mobile AC is worth it only if you can test it working, it includes the hose and window kit, and the price reflects the risk. Otherwise, the warranty, accessories, and certainty of a new unit make it the safer choice. If you'd rather buy new, check which correctly-sized units are in stock near you.