Vacuum Wont Turn On: What to Check Before Calling Support

If your vacuum wont turn on, it is usually failing at one of three points: the power supply, the battery and charger, or a protection feature that has shut the machine down. Work through them in that order, cheapest check first. The steps below cover corded uprights and canisters, cordless sticks, robot vacuums and shop vacs, because the fixes differ by type.

Light patterns and button combinations vary by model. If your manual disagrees with anything here, follow the manual.

Why won't my vacuum turn on? Start with these first checks

Before blaming the motor, rule out the simple causes:

1. Unplug the machine (or take it off the charger) before you inspect anything.
2. Confirm power at the source. For a corded model, plug a lamp or phone charger into the same outlet. Check your breaker panel and any outlet reset button.
3. Look at the cord and plug for cuts, crushed sections or bent prongs.
4. Check the switch or trigger. Make sure it moves freely and is not jammed with debris.
5. Let it rest. If the machine stopped mid-job and now does nothing, give it time to cool before retrying, since a long, heavy session is a reasonable suspect for a protective shut-off.

If none of this changes anything, move to the section for your type of vacuum.

Corded upright and canister vacuums with no power

If the outlet is live and the cord looks intact, the remaining suspects are the switch, a cord damaged inside its insulation, or the motor. Those are usually beyond a safe home fix.

What you can safely do:

• Try a different outlet, ideally on a different circuit, and plug the vacuum in directly rather than through a power strip.
• Check that any removable parts, such as a cord reel cover or dust bin, are seated.
• Empty the dust bin and clean the filters so the airflow path is clear before you assume the motor has failed.

If the machine has power at the plug but still won't run, and you are not trained to work on appliances, stop there. For a Bissell or any other brand under warranty, contact the manufacturer first, because opening the machine yourself can complicate a claim.

Cordless stick vacuums: Dyson and Shark won't start or won't charge

On a battery vacuum, "won't turn on" usually comes down to the battery, the charger, or the contacts between them.

Check the charging setup first. Use the charger that came with the vacuum, make sure it is fully seated in the outlet and the machine or dock, and confirm the outlet works. Wipe visible dust off the charging contacts with a dry cloth.

Bring it to room temperature. If your vacuum has been in a hot garage or a cold car, let it return to room temperature before testing. Your model's manual or support page will say whether it has temperature limits and what its warning lights mean.

Read the lights. A Dyson stick vacuum with a blinking red light is signaling something specific, and the meaning depends on the model, including older ones such as the V8. Look up the light pattern in your manual or on Dyson's support site, and note the pattern and your model number before you contact them. The same goes for a blinking Shark vacuum cleaner: patterns differ between series, so look up your model's troubleshooting guide on Shark's support site rather than guessing.

Know the limits. If the machine does nothing on its original charger with clean contacts, and it has had time to come to room temperature, the battery or the charger is the likely cause. That is a job for the manufacturer or an authorized replacement part. If you end up shopping for a new machine, our best Dyson cordless vacuums page lists the models we cover.

Robot vacuums: when a Roomba won't turn on

A robot that looks dead is often just deeply discharged. iFixit's troubleshooting guide for the Roomba j7+ gives the following order, which is a sensible starting point for other models too, though buttons and timings vary:

1. Make sure the battery is installed and seated correctly.
2. Plug in the base and place the robot on it for 10 to 15 minutes before trying again.
3. Clean and align the charging contacts on the robot and the base. If both show lights, the battery may need replacing. If the base lights up but the robot doesn't, the robot may need repair. If the base shows no light, try another outlet and check the cord.
4. Reboot: hold the CLEAN button for 20 seconds, release it, and wait for the light ring to turn off before returning the robot to its base.
5. If it still won't power on, the battery may have failed, or an internal component may be at fault. Contact iRobot Customer Care, especially if the robot is under warranty.

Shop vacs and wet-dry vacs that won't start

A utility wet/dry vac is a corded machine, so run the first checks above, including a known-good outlet. Shop-Vac's own troubleshooting page lists a defective switch or defective motor as the possible causes when a vacuum will not start, and points you to Customer Service for both. It also notes that some On Demand models (925-63, 925-64 and 925-65) have a circuit breaker button that can pop out. If yours does, push it back in, and contact Customer Service if that doesn't fix it.

Because wet-dry use mixes moisture, dust and electricity, keep the machine unplugged while you look inside, and do not probe the switch or motor wiring unless you know how to do so safely.

When to stop troubleshooting and replace it

Support or a replacement is the better path when:

• the outlet, cord, charger and contacts all check out and the machine still does nothing;
• a cordless battery will not take a charge on the original charger;
• the cord is damaged, or the machine smells burnt or keeps tripping a breaker;
• the repair quote is a large share of what a new machine costs.

Check the warranty before paying for parts. Terms vary by brand and model, so read yours rather than assuming. If you decide to buy new, our other vacuum cleaner guides explain how to match type and features to your home, and our best vacuum cleaner overview is a place to start comparing models by specifications.

If it starts but then cuts out, our guide on a vacuum that keeps shutting off covers that case.