LG CordZero All-in-One A931KWM vs LG CordZero Q3
Quick take: The LG CordZero Q3 costs $301 less.
Which one to buy
Most of the $120 between these LG sticks pays for the tower. The LG CordZero All-in-One A931KWM docks into a tower that empties the bin into a bag and charges the battery, and it's rated at 210 AW. The LG CordZero Q3 hangs on a plain charger, is rated at 150 AW, and has no ThinQ app. Both carry one battery rated for 60 minutes, Kompressor compaction, a 33.8 oz bin and a handheld mode, and both auto-adjust between carpet and hard floor.
Owners rate the two closer than the price gap suggests, and runtime is the weak spot in both. A931KWM owners report about 14-20 minutes at full suction. Q3 owners report about 20 minutes on medium and 10 on high, and call the low setting too weak to pick much up. Cereal and popcorn give both trouble.
Where they part is suction versus build. A931KWM owners rave about the suction, especially on wool rugs. But they also say the tower often leaves pet hair stuck around the filter, its bags are an ongoing cost, and some units cut out after seconds or broke within about three months. Q3 owners say the opposite: it doesn't deep-clean carpet well, but it feels sturdier than expected, the battery swaps out mid-clean, the cyclones and filters wash easily, and several report 3 to 7 years of daily use. The catches are its motor warranty, which is 1 year rather than the longer motor coverage on the A931KWM, and a minority who couldn't get parts after a failure.
For carpet and allergy households that want strong suction and hands-off emptying, the A931KWM is worth the extra $120 if you keep the receipt. For hard floors and quick daily cleanups, the Q3 is the more durable-sounding buy and leaves money for a second battery.
LG CordZero All-in-One A931KWM
Best for rugs and carpet, or if dumping a bin by hand bothers your allergies; register it, given the early-failure reports.
LG CordZero Q3
Choose the LG CordZero Q3 for hard floors and light rugs, and budget for a second battery since owners see 10-20 minutes at useful power.
| Spec | LG CordZero All-in-One A931KWM | LG CordZero Q3 |
|---|---|---|
| Price | ~$600 | ~$299 |
| Type | Cordless Stick | Cordless Stick |
| Suction | 210 AW | 150 AW |
| Battery | 60 min | 60 min |
| Navigation | — | — |
| Filtration | 5-Step Filtration System | 5-Step Filtration System |
| Cordless | Yes | Yes |
| Bagged | No | No |
| Noise | 84 dB | 82 dB |
| Dustbin | 33.8 oz | 33.8 oz |
| Water tank | — | — |
| Self-empty dock | Yes | No |
| Auto mop washing | No | No |
| Hot water washing | No | No |
| Obstacle avoidance | No | No |
| Carpet detection | No | No |
| Auto mop lifting | No | No |
| Multi-floor mapping | No | No |
| App control | Yes | No |
| Dimensions | 10.1 x 11.7 x 39.7 in | 10.4 x 12.0 x 44.1 in |
| Weight | 5.95 lbs | 6.28 lbs |
| Warranty | 1 year (10-year motor warranty, parts only) | 1 year |
Pros & cons
LG CordZero All-in-One A931KWM
- ✓Auto-empty, auto-charge tower for meaningfully less than LG's flagship A949KTMS
- ✓Kompressor tech compacts debris so the small bin needs emptying less often
- ✓Dual Floor Max nozzle handles carpet and hard floors without swapping heads
- ✓ThinQ app tracks battery health, filter status, and runs diagnostics
- ✓Washable, removable filters keep ongoing filter costs low
- ✓LED headlight and telescoping wand for reach and visibility
- ✓Real street price (~$400) undercuts the $599.99 list price substantially
- ✗Single battery caps runtime at about an hour, less in Power/Turbo mode
- ✗Long-term owners report mixed cleaning performance, including units that cut out after seconds of runtime
- ✗Multiple owners report the vacuum breaking within roughly three months of normal use
- ✗Auto-empty tower reliability is inconsistent — works well for some, stops working reliably for others
- ✗Tower disposal uses proprietary bags, not a simple bagless bin — a recurring cost
- ✗No mop attachment or second battery — those are reserved for the pricier A949KTMS
LG CordZero Q3
- ✓Auto Multi-Surface Detect adjusts suction between carpet and hard floor automatically
- ✓Kompressor compaction technology at a price point that usually skips it
- ✓5-step filtration with removable, washable cyclone and filters
- ✓Detachable handheld mode for stairs, upholstery, and car interiors
- ✓LED-lit crevice tool included in the box
- ✓Meaningfully cheaper than LG's Kompressor and All-in-One CordZero tiers
- ✗No ThinQ app or WiFi diagnostics, unlike LG's step-up models
- ✗Single battery caps runtime at 60 minutes in normal mode, less in Turbo
- ✗150 air-watt suction rating is lower than LG's Kompressor+ThinQ and All-in-One models
- ✗Plain 1-year parts-and-labor warranty, no extended motor coverage
- ✗Too new and low-profile a listing to have an established long-term reliability record
LG CordZero All-in-One A931KWM vs LG CordZero Q3: common questions
Is the LG A931KWM's tower worth $120 more than the CordZero Q3?▾
If you want to avoid emptying a bin and clean a lot of carpet, yes. Owners say the tower still needs occasional clearing of stuck pet hair and uses paid bags, so it reduces upkeep rather than ending it.
Which LG CordZero runs longer on a charge?▾
Neither runs long at useful power. A931KWM owners report about 14-20 minutes at full suction, and Q3 owners report about 20 minutes on medium and 10 on high, despite both being rated at 60 minutes.
Which is more reliable, the LG CordZero Q3 or the A931KWM?▾
The Q3 has the better track record, with several owners reporting 3 to 7 years of daily use. Some A931KWM owners describe units cutting out or breaking within about three months, though the A931KWM carries the longer motor warranty.