Direct answer
For the Shark PowerDetect Speed cordless vacuum, hair wrap, floor setting, blockage, belt/head power and overload protection should be separated. First, disconnect power and clear the roll/end caps.
What this covers
- Shark PowerDetect Speed cordless vacuum (IZ862H)
- Shark vacuum; DuoClean, PowerFins, Lift-Away, Clean Sense and self-empty equipment vary.
- The specific fault this record addresses: brush roll will not spin
What it does not cover
- ×The same symptom on a different Shark 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
Hair or thread is wrapped around the roll's end bearings
What separates it The roll spins with visible resistance or not at all, and pulling gently on visible strands at either end reveals more wound underneath.
How to confirm With power disconnected, remove the roll per the model's tool-free or tool-assisted release and clear wrapped material fully, including under the end caps.
- 2
The floor-type setting doesn't match the surface, or auto-adjust height sensing has a fault
What separates it The brush works on one floor type (hard floor or carpet) but not the other, or the head visibly doesn't adjust height when moved between surfaces.
How to confirm Manually cycle through the floor-type settings if the model has them, and confirm the auto-height mechanism moves freely on both surfaces.
- 3
The drive belt has broken (belt-driven models only)
What separates it The roll spins completely freely by hand with no resistance and the motor runs, but the roll doesn't turn under power at all.
How to confirm This applies only to belt-driven brush systems; direct-drive brush motors don't have this failure mode.
- 4
Overload protection has tripped from a jam
What separates it The brush stopped abruptly during use, possibly with a brief burning-rubber smell, rather than never having worked.
How to confirm Clear the jam fully, let the unit cool per the manual, and it should reset on the next power cycle.
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 roll spins freely by hand with power disconnected, resists, or is fully seized.
- Whether the problem is on one floor-type setting only or across all settings.
- Any visible hair, thread or debris wrapped around the roll or its end caps.
Disconnect power before any inspection
ReversibleNever inspect or clear a brush roll while the vacuum is powered.
Remove the roll and clear wrapped hair or thread from the entire length and end caps
ReversibleThis resolves the large majority of brush roll complaints.
Confirm free rotation by hand after clearing
ReversibleTest on the correct floor-height setting for the surface being used.
Arrange service or replacement for a confirmed broken belt or failed brush motor
ReversibleThis is a customer-replaceable part on most models once diagnosed.
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
- IZ862H. Shark vacuum; DuoClean, PowerFins, Lift-Away, Clean Sense and self-empty equipment vary.
- Type — cordless stick (battery)
- A CORDLESS STICK with a battery; mode-dependent runtime (boost drains fast). PowerDetect auto-adjusts suction to dirt/floor, so the pull and sound change automatically — a feature, not surging.
- Filter & airway
- Washable filter — wash on schedule, dry fully. Clear the wand and head for suction loss; a damp filter cuts suction and runtime.
- Battery/charging
- Charges on its base or dock; if it will not run, confirm it is charged and the battery is seated. Boost mode always runs shorter than the standard mode.
- Symptom boundary
- This record covers Shark PowerDetect Speed cordless vacuum when it brush roll will not spin. A different symptom on the same hardware, or this symptom on a different Shark 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 hot rubber smell, melted plastic, sparks, or a roll that's seized solid even after clearing debris.
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. Shark Support publishes this as "Maintenance & Most Common Inquiries - Cordless Vacuums". Shark's own device-agnostic cordless-vacuum maintenance/troubleshooting article. What that article does not carry is the model boundary — it is written for a product line, and IZ862H 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 Shark PowerDetect Speed won't turn on.+
First confirm it is charged — seat it fully on the dock/charger and look for the charge indicator; a fully depleted battery needs time before it will start. Check the battery is clicked in properly. If it charged but still cuts out, clear any blockage in the wand, dust cup and head (a blockage trips the protection) and wash/dry the filter. Boost mode also drains the battery fast, so a short run then stop can simply be a low charge on high power.
The brush roll won't spin and I can see hair wrapped around it.+
This is by far the most common cause. With power fully disconnected, remove the roll per the model's release mechanism and clear the wrapped hair from the entire roll and both end caps — hair often hides under the caps even when the visible middle looks clear.
Does this answer apply to every Shark model?+
No. It is scoped to IZ862H. Shark vacuum; DuoClean, PowerFins, Lift-Away, Clean Sense and self-empty equipment vary.
What should I record before troubleshooting brush not spinning or roller?+
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 brush not spinning, roller. The ordered checks preserve that evidence.
When should I stop and use qualified service?+
Stop for hot rubber, melted parts, sparks or a seized roll.
Answer for the exact device and software version shown above.