Direct answer
For the Dyson V15 Detect cordless vacuum, outlet, charger, dock contacts, battery temperature and pack condition should be proved before replacement. First, cool to room temperature and use the specified charger/outlet.
What this covers
- Dyson V15 Detect cordless vacuum (SV22 / V15 Detect)
- Dyson vacuum; filter, battery, cleaner head and LCD fault behavior vary by model.
- The specific fault this record addresses: will not charge
What it does not cover
- ×The same symptom on a different Dyson product line, which has its own record and its own cited source
- ×An on-screen error code whose meaning has not been checked against this exact model's manual
- ×Live electrical, gas, sealed-system, internal battery-cell or structural repair — a technician boundary, not a self-service step
Differential
What actually causes this, and how to tell them apart
These are ordered by how often each one is the answer, not by how easy it is to try. The point of the middle column is that two causes producing the same headline symptom rarely produce the same detail — that detail is what tells you which one you have before you change anything.
- 1
The battery is outside its charging temperature range
What separates it The vacuum was just used heavily (battery still warm) or stored somewhere very cold, and charging doesn't begin or the indicator behaves unusually.
How to confirm Let the unit cool or warm to room temperature before attempting to charge again.
- 2
Dock or plug contacts are dirty or not making a clean connection
What separates it Charging is intermittent, or works when the unit is pressed firmly into the dock but not when simply set down.
How to confirm Inspect and clean the contacts on both the unit and the dock/charger with the power disconnected, and confirm dry contact with firm, flush seating.
- 3
The charger or cable itself has failed rather than the vacuum
What separates it No charging indication at all, regardless of contact cleanliness or seating.
How to confirm Swap in the specified charger/cable if a spare is available, or test the vacuum's charge port with a different known-good charger of the exact specified type.
- 4
The battery pack itself has failed
What separates it Confirmed correct temperature, clean contacts and a known-good charger, and still no charge indication or progress.
How to confirm This is the conclusion only once the accessory and connection points are ruled out.
Before you touch a setting
Record this first — changing settings destroys the evidence
Every item below stops existing the moment a reset, re-pair or settings change is made. Written down first, they are what separates the causes above; recovered afterwards, they are guesswork.
- Whether the unit was hot from recent use or cold from storage right before the failed charge attempt.
- Whether charging is fully absent or just intermittent depending on how firmly the unit is seated.
- Whether a specified replacement charger/cable is available to swap in as a test.
Let the unit reach room temperature before attempting to charge
ReversibleBoth very hot and very cold batteries can refuse to charge as a safety measure.
Inspect and clean dry contacts on both the unit and dock or plug
ReversibleConfirm firm, flush seating rather than a loose or angled connection.
Test with a specified replacement charger if available
ReversibleIsolates a failed charger/cable from a failed battery or charge port.
Confirm charge indication and useful runtime after correction
ReversibleA charge light alone isn't sufficient — confirm it actually holds a useful charge.
Model-specific
What is true of this model and not of its siblings
Generic advice for the product line fails here. Each item below is a property of this specific model family that changes which of the steps above apply to you.
- Model scope
- SV22 / V15 Detect. Dyson vacuum; filter, battery, cleaner head and LCD fault behavior vary by model.
- Type — cordless stick (battery)
- A CORDLESS STICK vacuum with a click-in, replaceable battery. Runtime depends heavily on mode: Boost/MAX drains the battery in minutes by design, so 'short runtime on MAX' is normal — Eco mode runs far longer. A vacuum that pulses/stops is usually a blocked airway (bin, filter, wand) triggering the protection, or a battery too hot/cold.
- Laser + piezo dust detection
- The V15 projects a green laser on the floor to reveal fine dust and counts particles on its LCD screen. If the laser/counts seem wrong, that is a detection feature, separate from suction; the laser only works on hard floors at a low angle.
- Filter & airway
- One washable lifetime filter — wash it monthly and let it dry fully (24 hours) before refitting; a damp or clogged filter causes suction loss and pulsing. Clear the wand, bin inlet and cyclone of blockages for 'no suction'.
- Symptom boundary
- This record covers Dyson V15 Detect cordless vacuum when it will not charge. A different symptom on the same hardware, or this symptom on a different Dyson product line, has its own record with its own causes and its own cited source.
Stop boundary
When this stops being a self-service repair
Continuing past any one of these costs more than the repair saves — in safety, in warranty, or in evidence a technician needs.
- !Stop for swelling, heat, an odor, liquid exposure or visibly damaged contacts — do not continue attempting to charge a battery showing any of these.
Evidence ledger
Sources behind this answer
Visible sources support the visible claims. Home Product Support records the publisher, the fact used and the review date; community reports can suggest an issue but do not become a published fact on their own.
Where the manufacturer's article stops. Dyson Support publishes this as "Product support". Official Dyson troubleshooting, maintenance, parts and repair entry point. What that article does not carry is the model boundary — it is written for a product line, and SV22 / V15 Detect is the scope applied here. Where a control label, terminal, indicator pattern or reset sequence differs on your unit, the manual for that exact model is the authority, not this page and not the article.
Exact questions
Common follow-ups
My Dyson V15 keeps pulsing / stopping and starting.+
Pulsing is the V15 protecting itself, almost always from a blockage or a filter problem. Check the whole airway — empty the bin, wash the filter and let it dry a full 24 hours, and clear the wand, cleaner head and cyclone of hair and debris. A battery that is very hot or very cold also causes cut-outs; let it reach room temperature. On Boost/MAX the battery also simply runs down fast, which is normal, not a fault.
My vacuum won't charge right after I finished using it.+
Let it cool to room temperature first — a battery that's still warm from use is often outside the charging circuit's allowed temperature range, which is a safety feature, not a fault, and resolves once it cools.
Does this answer apply to every Dyson model?+
No. It is scoped to SV22 / V15 Detect. Dyson vacuum; filter, battery, cleaner head and LCD fault behavior vary by model.
What should I record before troubleshooting not charging or battery?+
Record the complete model identifier, exact message or indicator, software/firmware where visible, the operating stage and what still works.
Why is a factory reset not the first step?+
A reset can erase accounts, networks, maps, schedules or preferences without distinguishing not charging, battery. The ordered checks preserve that evidence.
When should I stop and use qualified service?+
Stop for swelling, heat, odor, liquid or damaged contacts.
Answer for the exact device and software version shown above.