A Shark PowerDetect Speed cordless vacuum that keeps stopping is usually protecting its motor or running out of battery, and the PowerDetect feature, which adjusts suction automatically to the floor and the dirt, can make the sound and the power change in ways that look like faults. The vacuum senses the dirt and the surface and raises or lowers its suction, so a change in noise is normal and not a surge. A stop is different: the motor goes quiet. Check the battery first.
The checks in more detail
This is a cordless stick with a battery that drains faster in the boost mode, and a low battery stops the vacuum. Charge it on its dock or with its charger until the light shows full, and use the lower modes for longer runs. A battery that is hot after a long run or cold from a garage may stop, so let it reach room temperature. The second cause is the airway. A clogged wand, a full dust cup or a dirty filter restricts airflow, and the motor stops to protect itself.
Empty the dust cup, remove the wand and the floor head and look through them for a clump of hair or debris, and clear it. Wash the filter as the manual describes, with cold water, and let it dry fully, as a damp filter cuts the suction and the runtime. The brushroll can wrap with hair and stall; cut it free. A stalled brushroll can trip the motor. Check the connections. The battery pack clicks into the vacuum, and a loose pack interrupts the power; remove and refit it firmly.
The floor head's electrical connection to the wand can be dirty, so wipe the contacts. Make sure that the charging dock or cable is plugged in and the contacts are clean. Update the vacuum if it has an app. If the vacuum stops soon after the start with a clear airway and a full battery, the battery may be worn, and replacement packs are sold for the model. A vacuum with a burning smell should be stopped. Contact Shark with the model number and the date of purchase if the stops continue, since the battery and motor are covered by warranty.
Differential
Likely causes of “Shark PowerDetect Speed cordless vacuum keeps stopping, pulsing or shutting off”, and how to tell them apart
- 1
A low or worn battery
What separates it It stops soon after starting
How to confirm Charge it and replace an old pack
- 2
A blocked wand or full cup
What separates it The motor stops to protect itself
How to confirm Clear the airway and empty the cup
- 3
A dirty or damp filter
What separates it Weak suction and stops
How to confirm Wash it and dry it fully
- 4
A stalled brushroll
What separates it It cuts out on carpet
How to confirm Cut away hair and free the roll
- 5
A loose battery pack or dirty contacts
What separates it Power cuts as it moves
How to confirm Refit the pack and wipe the contacts
Before you touch a setting
Record this first — changing settings destroys the evidence
- The power mode
- How long it runs before stopping
- The filter's state
- The battery's age
Try in this order
0 of 6 completedCharge the battery
ReversibleAnd use a lower mode.
Empty the dust cup
ReversibleAnd clear the wand.
Wash and dry the filter
ReversibleFully.
Free the brushroll
ReversibleOf hair.
Refit the battery
ReversibleAnd wipe the contacts.
Contact Shark
ReversibleIf it persists.
Model-specific
What is true of this model and not of its siblings
- PowerDetect
- Automatic suction changes are normal.
- Battery
- Boost mode drains it fast.
Stop boundary
When this stops being a self-service repair
- !If it stops with a clear airway and a full battery, contact Shark with the model number and purchase date
- !Replace an old battery pack
- !Stop if you smell burning
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Why does my PowerDetect change noise?+
It adjusts suction to the dirt and floor.
Why does it stop?+
The battery or a blocked airway.
How long should the filter dry?+
Fully, usually a day.