Shark FLEX Duoclean HV394QCO Vacuum Cleaner Manual

The Shark FLEX Duoclean HV394QCO is a versatile corded stick vacuum cleaner featuring DuoClean technology for cleaning carpets and hard floors, a flexible wand for under-furniture reach, a large dust cup, multiple cleaning modes, LED headlights, and various attachments. Powered by 120V AC, 60Hz. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Unpacking & Assembly 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Using Attachments 7. Cleaning Modes & Operation 8. Maintenance & Care 9. Regulatory Information 10. Troubleshooting

Features at a Glance

Key components: Main vacuum unit with DuoClean brushroll, Flexible wand, Dust cup with emptying mechanism, Power cord, Various attachments (crevice tool, dusting brush, upholstery tool).

FeatureDescription
DuoClean TechnologyDual brushrolls for carpets and hard floors
FLEX WandBends to clean under furniture without moving items
LED HeadlightsIlluminates dark areas under furniture
Large Dust CupEasy-empty, no-touch dirt disposal
Cleaning ModesFloor, Above-Floor, Handheld modes
AttachmentsCrevice tool, dusting brush, upholstery tool included
Power CordLong cord for extended reach
Power ButtonTurns vacuum on/off
Mode SelectorSwitches between cleaning modes
Wand ReleaseButton to detach wand for handheld use

Unpacking & Assembly

Unpack and inspect all contents. Assemble before first use.

  1. Attach wand: Insert wand into vacuum body until it clicks securely.
  2. Attach floor nozzle: Connect DuoClean floor nozzle to wand end.
  3. Install attachments: Store attachments on dock or connect as needed.
  4. Plug into AC power outlet.

WARNING! Ensure vacuum is unplugged during assembly. Keep fingers clear of moving parts.

First-Time Setup

Plug in vacuum; perform initial check.

  1. Check brushroll: Ensure brushroll spins freely and is clear of debris.
  2. Test modes: Use mode selector to switch between Floor and Above-Floor modes.
  3. Test attachments: Connect crevice tool and dusting brush to ensure secure fit.
  4. Empty dust cup: Press release button to remove and empty dust cup.

CAUTION! Do not use vacuum if brushroll is obstructed. Unplug before maintenance.

Specifications

Controls and Settings

Power Button: On/off switch. Mode Selector: Floor mode for carpets/hard floors, Above-Floor mode for wand/attachments, Handheld mode for detachable pod.

LED Indicators: Headlights activate in Floor mode. Brushroll Indicator: Shows if brushroll is spinning. Dust Cup Full Indicator: Alerts when dust cup needs emptying.

Settings: Adjust suction power via mode selector. Use wand release for handheld cleaning. Empty dust cup via release button.

Using Attachments

Attachments: Crevice tool for tight spaces, Dusting brush for surfaces, Upholstery tool for furniture.

  1. Turn off and unplug vacuum before changing attachments.
  2. Detach wand: Press wand release button.
  3. Connect attachment: Insert into wand or handheld pod until click.
  4. Select Above-Floor mode for attachment use.

Tip: Store attachments on dock for easy access.

Cleaning Modes & Operation

Supports Floor, Above-Floor, and Handheld modes.

  1. Floor mode: For carpets and hard floors; DuoClean brushroll adjusts automatically.
  2. Above-Floor mode: For wand and attachments; use for stairs, curtains, ceilings.
  3. Handheld mode: Detach pod for portable cleaning.
  4. Flex wand: Bend wand to clean under furniture without moving items.
  5. Empty dust cup: Press release button; hold over trash; close securely.
  6. Clean filter: Remove and wash filter monthly; dry completely before reuse.

WARNING! Do not vacuum wet spills, large objects, or hot ashes. Unplug after use.

Maintenance & Care

Regular maintenance ensures optimal performance.

  1. Empty dust cup after each use.
  2. Clean brushroll: Remove debris from brushroll weekly.
  3. Wash filter: Remove and rinse filter under water monthly; air dry 24 hours.
  4. Check for blockages: Inspect hose, wand, and nozzles for clogs.
  5. Store properly: Hang on wall or store in dry area.

CAUTION! Unplug before maintenance. Do not use damaged parts.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © 2023 SharkNinja Operating LLC. For support, visit www.sharkclean.com or contact 1-800-798-7398.

Troubleshooting

SymptomPossible CauseCorrective Action
Vacuum won't turn onPower cord/outletCheck power cord connection; try different outlet; ensure power button is pressed.
Loss of suctionFull dust cup/clogEmpty dust cup; check hose, wand, and nozzle for blockages; clean filter.
Brushroll not spinningDebris/worn beltClear debris from brushroll; check belt for wear and replace if needed.
Vacuum overheatsClog/filterTurn off and unplug; check for clogs; clean filter; allow to cool 60 minutes.
Unusual noiseForeign objectTurn off and unplug; inspect brushroll, hose, and attachments for objects.

Reset: Unplug for 60 minutes; plug back in.

Service: 1-800-798-7398; www.sharkclean.com

Shark FLEX Duoclean HV394QCO Vacuum Cleaner Manual © - All Rights Reserved 2025