Dyson Vacuum Cleaner F9 Fix (Error Code Guide)

Do this in order, don’t skip steps. Unplug / power off first.

• 1. Let it cool down
  If it suddenly stopped and showed F9, leave it off for at least 30 minutes. The thermal cut-out may have tripped.
• 2. Empty the bin properly
  Don’t just dump the top layer. Open the bin, bang the packed dust out into a bag, and make sure nothing is jammed up around the shroud or bin inlet.
• 3. Check for blockages front to back
  Work in a straight line:
  • Remove the floor head. Look in the neck for hair or toys wedged inside.
  • Check the wand/tube. Hold it up to a light. If you can’t see clean through, it’s clogged.
  • Check the short hose and any U-bends or elbow joints on uprights.
  • If it’s a cordless, check the small airway right where the wand clicks into the main body.
  If you find a solid plug, push it out with a broom handle or straight rod. Don’t use anything sharp.
• 4. Clean the brush bar
  Pull the brush bar out of the head (most Dyson heads have a coin slot or latch). Strip off hair, string, and carpet fibers. Make sure the ends spin freely in their bearings.
• 5. Wash or swap the filters
  Most Dysons have at least one pre-motor filter, many have a post-motor/HEPA filter too.
  • Take the filters out.
  • Rinse in cold water only, no soap, no hot water.
  • Squeeze out excess water and let them dry a full 24 hours, bone dry, before refitting.
  Wet filters choke airflow and can trigger F9 again, so don’t rush this.
• 6. Check all seals and latches
  Refit the bin, wand, hose, and filters firmly until they click. Air leaks at a bad seal can fool the pressure sensor and throw an error.
• 7. Battery and power check (cordless)
  If it’s cordless and still shows F9:
  • Fully charge it until the charger light goes out.
  • Try running it on normal/low power first, not boost.
  A weak battery can cause voltage drops under load and throw fault codes.
• 8. Try again under light load
  Run the vacuum with no floor head and no wand, just the main body or hose. If it runs fine like that but F9 appears when you add the head or wand, the blockage or drag is in that attachment.
• 9. When to call Dyson
  If you’ve:
  • Cleared all blockages.
  • Cleaned and fully dried filters.
  • Checked seals, head, and hose.
  …and F9 pops up immediately or the motor barely starts, the manual answer is: contact Dyson support. At that point they’re usually talking motor, control board, or sensor replacement.