The vacuum that lasts is the one you can open

A vacuum lasts when the parts that wear out are cheap, easy to reach and still for sale in year six.

The motor is rarely the story. Everything around it is.

Where these usually wear out

A vacuum has a hard job. It eats sand, pet hair, sock lint and the occasional Lego, then gets blamed when it chokes. Most of the weak points sit in the path of all that debris.

The belt. On many uprights, a rubber belt spins the brush roll. Rubber stretches, dries out and snaps. That's normal, and it's fine if you can swap it in five minutes. It's a problem if you need a screwdriver set and a free Saturday. Some machines drive the brush roll directly and have no belt at all. Find out which kind you're buying.

The brush roll. Hair wraps around the ends and works into the bearings. Look for a roll you can pull out without tools, and end caps you can get a scissor blade under.

The motor. Many designs cool the motor with the same air that carries the dirt. A clogged filter, a full bag or a blocked hose starves it of airflow, and it runs hot. So a motor often dies because the owner skipped maintenance. Check whether the machine has a washable filter, how you get at it, and whether there's a clear indicator for a blockage.

The hose and wand. Flex points crack. Pinch the hose and bend it at the ends in the store. Look at the latches and the release pedal. Thin plastic tabs that you'll press a thousand times are a poor sign.

The switch and the cord. A power switch is a moving part. A cord that winds into a reel adds one more. On cordless sticks, the battery is the wear item. Rechargeable batteries lose capacity with age and use, so you want one you can replace yourself.

The warranty, decoded

A warranty is a contract, and the headline number is the least interesting part of it. Get the actual document from the maker's website and read it before you buy. Check for:

• Length, split by part. Many warranties give the motor, the battery and the rest of the machine different terms. Find each one.
• Parts versus labor. A warranty that replaces parts but leaves you paying for the repair is half a warranty.
• What's excluded. Belts, filters, brush rolls and hoses are often listed as wear items. That's reasonable. Just know it going in.
• What voids it. Look for language about commercial use, non-approved parts, and damage from picking up things the manual says not to.
• Who pays shipping. If a repair means mailing a twenty-pound machine, that cost matters.
• Registration. Some makers require it. Do it the day you open the box, and keep the receipt in a folder you can find.
• Where service happens. Ask whether there's an authorized repair shop near you or whether everything goes by mail.

If you can't find the warranty document before you buy, that tells you something too.

Can you fix it?

Repairability is the quiet difference between a ten-year machine and a three-year one. You can check most of it from your couch.

1. Search the maker's site for the model number plus "replacement parts." Belts, filters, brush rolls, hoses and batteries should be sold directly, with prices posted. If the only option is a third-party listing of unknown origin, take note.
2. Look for an exploded parts diagram or a service manual. A maker that publishes one expects the machine to be opened.
3. Check the fasteners. Standard Phillips or Torx screws are good news. Glue, rivets and hidden clips aren't.
4. Check how the belt and brush roll come out. Plenty of manuals and videos show this. If it takes more than a couple of minutes on camera, it'll take longer in your hands.
5. For cordless, find out if the battery is removable. Ask whether replacements are sold and whether they'll still be sold in five years. Nobody can promise that, but a maker who's sold replacements for older models is a better bet.
6. Search for a teardown or repair video. If nobody has ever opened it on camera, you'd be the first.

Keep a basic kit for this work. Ten tools that cover ninety percent of household repairs lists everything a vacuum needs. And swapping a belt belongs on the list in Five house repairs you should stop paying someone else to do.

What long-term owners report

Launch-week reviews are written by people who've used the thing for a weekend. You want the people who've had it for a year.

• Search the model number with "one year later" or "after two years." Read those first.
• Sort by lowest rating and read the one-star and two-star reviews. Ignore the shipping complaints and the person who wanted a different color. Look for the same failure showing up again and again: a latch, a switch, a battery that quit.
• Read the maker's replies. Do they offer a fix or a form letter?
• Check repair forums and video sites. If a model is common in repair threads, read why. Sometimes it's popularity. Sometimes it's a design flaw.
• Check the parts page. If the belt for a four-year-old model is out of stock for months, that's worth knowing.

Treat reviews as a pattern to read, not a number to trust. One angry post is noise. Twenty describing the same crack in the same spot is information.

Cost per year of use

Price tags lie by omission. Here's a worked example, with made-up numbers so you can see the method. These aren't quotes.

Say a budget upright costs $120 and lasts three years. That's $40 a year. Add $12 a year for belts and filters and you're at $52 a year.

Say a sturdier machine costs $300. If it lasts ten years, that's $30 a year, plus the same $12 for parts: $42 a year.

The sturdier machine wins, but only if it really lasts. The break-even is about seven and a half years. If it dies at five, it costs $72 a year and the cheap one was the better deal.

That's why the repair questions above matter more than the sticker. A machine you can fix gets to seven and a half years. One that's sealed shut might not. You can run your own numbers in the BRO cost-per-use calculator. Check the current price before you do.

Before you buy

• Read the full warranty document, not the box summary.
• Confirm the motor, battery and body terms separately.
• Find the belt and brush roll on the maker's parts page, with prices.
• Confirm you can open it with standard screws and no glue.
• Check that the filter is washable or cheaply replaceable.
• For cordless, confirm the battery is removable and sold separately.
• Read the one-year-later reviews and the worst reviews, looking for repeat failures.
• Flex the hose, press the latches and feel the switch in the store.
• Match the machine to your floors. Carpet, hardwood and pet hair want different brush designs.
• Register it and put the receipt where you'll find it.

Then put filter cleaning on your calendar. The home maintenance calendar that prevents the big repairs has room for it. Ten minutes on a filter does more for a vacuum than any feature on the box.

Buy the one you can open. It's the only one that lets you finish the job.