Quick Answer: Most portable and window air conditioner brands — Midea, LG, GE, Frigidaire, Black+Decker, Whynter, Friedrich, and Haier — cover the whole unit for just 1 year of parts and labor, then add a separate warranty covering the compressor only for another 3-5 years. That second number is real, but it covers a failure mode (compressor death) that’s less common in the first few years than the control-board and capacitor issues the shorter 1-year term actually has to handle. Two brands genuinely do better on full coverage: Hisense backs its entire portable lineup for 2 years parts-and-labor, and Danby matches that 2-year term on portables specifically (its window units stay at 1 year).
Warranty length rarely makes it into a spec sheet or a comparison table, but it’s one of the few numbers a manufacturer can’t fudge — it’s a legal commitment, not a marketing claim. We pulled the current, official terms for every brand this site reviews and compiled them below.
Warranty length by brand (2026)
| Brand | Standard full warranty | Extended compressor/sealed-system warranty |
|---|---|---|
| Hisense | 2 years parts + labor | None separate — 2 years covers everything but accessories (90 days) |
| Danby (portable) | 2 years parts + labor | None separate |
| Danby (window) | 1 year parts + labor | None separate |
| GE | 1 year full unit | 5 years, sealed refrigerating system |
| Frigidaire | 1 year full unit | 5 years, sealed system components |
| Black+Decker | 1 year parts + 1 year labor | 5 years, compressor only |
| Friedrich | 1 year (room AC models) | 5 years, compressor only |
| Whynter | 1 year full unit | 3 years total, compressor only (1 + 2 additional) |
| Midea (US consumer units) | 1 year | None published for window/portable |
| LG | 1 year | None published for portable/window room units |
| Haier (standard room AC) | 1 year | None published (separate from Haier's ductless mini-split terms, see FAQ) |
Sourced directly from each brand’s official warranty documentation (Whynter’s own warranty-information page, Black+Decker’s product pages, GE Appliances’ Zoneline warranty terms, Frigidaire HVAC’s warranty page, Danby’s product and support pages, Hisense’s Lowe’s/Home Depot-published limited-warranty PDF, Friedrich’s published warranty PDFs, Haier Appliances’ warranty-coverage page and ductless warranty PDF). Terms can change — always confirm on the brand’s own site before a purchase that hinges on warranty length.
Hisense portable air conditioner
- WiFi models add ConnectLife app control, Alexa and Google Assistant compatibility on top of the extended coverage.
- Accessories carry a separate, shorter 90-day warranty — keep that in mind if a hose or remote fails outside that window.
Whichever brand you land on, you don’t have to wait through a supply delay to get it — Prime delivers your portable AC in two days, and you can try it free for 30 days.
The catch with “5-year compressor warranty” marketing
A 5-year compressor warranty reads like a meaningfully better deal than a plain 1-year term, and brands lean on that number in their marketing. The catch is in what actually breaks, and when.
According to repair-industry troubleshooting data compiled by Market.com, compressor failure accounts for only about 15% of portable AC failures, and it typically shows up in units already over 5 years old — a compressor’s average working life runs 8-12 years, often longer than the compressor warranty itself. Meanwhile, power and control problems — faulty control boards and failed start capacitors — affect roughly 25% of units, a bigger share, and these failures cluster in the first few years of ownership, squarely inside the shorter 1-year full-unit term rather than the longer compressor-only one. A failed capacitor causes the compressor to hum loudly and shut off, or fail to start at all — a symptom that looks like “the compressor is dying” but isn’t actually a compressor failure, and isn’t covered by a compressor-only warranty once the 1-year full term expires.
In practice: the extended compressor warranty a brand advertises heavily is real, but it’s insurance against the failure you’re statistically less likely to hit early, while the failure you’re more likely to hit early is only covered for the shorter, less-advertised 1-year window. Read the 1-year full-coverage term as the number that matters most for a unit’s first few years, not the flashier compressor figure.
The two standout full-coverage warranties
Two brands sidestep that split entirely by just covering more, for longer, with one term instead of two:
Hisense backs its whole portable air conditioner lineup — including WiFi and inverter models — for 2 years of parts-and-labor coverage from the date of purchase, per its own published limited-warranty terms. That’s double the industry-standard 1 year, with no separate compressor carve-out to track. Accessories (hoses, remotes) still drop to a 90-day term, so a failed accessory outside that window is on you either way.
Danby matches the 2-year parts-and-labor term, but only on its portable air conditioners — its window units default back to the standard 1 year. If you’re comparing a Danby portable against a Danby window unit on warranty alone, the portable is the meaningfully better-covered purchase, which isn’t true of most other brands where portable and window lines carry identical terms.
Neither of these substitutes for our full lineup comparisons — see our Hisense air conditioner guide and Danby air conditioner guide for current models and prices.
Room ACs vs. central air: registration works differently
If you’ve owned a central air system or a mini-split, you might expect registering a new portable or window AC to unlock extra years of coverage. It generally doesn’t. Every brand’s terms above are fixed at the point of sale — registering mainly creates a manufacturer-side purchase-date record that speeds up processing if you’ve lost your receipt, not a longer warranty period.
That’s a genuine contrast with ducted and mini-split systems. Haier’s own ductless mini-split warranty, for example, standardly covers the indoor unit for 5 years and the compressor for 7 years — but registering within 60 days of installation upgrades both to a full 10-year term. No brand in this comparison extends anything close to that jump to its portable or window units regardless of registration, so don’t delay a portable AC purchase or install expecting a registration bonus that isn’t there for this product category.
What’s typically excluded
Across every brand’s terms reviewed here, a few exclusions repeat: commercial or non-residential use, cosmetic damage, and damage from misuse, accidents, or unauthorized modification are universally carved out. Accessories are also commonly covered for far less time than the unit itself — Hisense’s own terms cap accessory coverage at 90 days against the unit’s 2 years, and several other brands draw a similar line. Every brand requires proof of purchase to process a claim, so the receipt matters more than the registration card in this category.
If your unit is already out of its full-coverage window and showing symptoms, start with our not-cooling troubleshooting guide or won’t-turn-on guide before assuming it’s a warranty-covered compressor failure — a $10-20 capacitor is a far more likely, and far cheaper, culprit in the first few years.
The bottom line
Plan around 1 year of full coverage as the realistic default across most brands, with a 3-5 year compressor-only add-on that covers a less common, later-onset failure mode rather than the control-board and capacitor issues more likely to hit first. If full-warranty length is a real factor in your decision, Hisense (2 years, whole portable lineup) and Danby’s portable line (2 years) are the only two that meaningfully beat the 1-year standard. Buying used instead? Our used portable AC guide covers the risk a warranty can’t help you with — a seller’s unit almost certainly won’t carry any remaining manufacturer coverage at all.