- Appliances
- Personal care devices
Three flashing red LEDs
Dyson Three flashing red LEDs on Supersonic: filter and alert
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
If all three red lights flash on your Dyson Supersonic hair dryer, the manual says to clean the filter first. If they keep flashing afterwards, do not switch it on again and contact Dyson customer care.
Safety first
Stop and check this first
- Do not open the dryer body or try to get round the alert: the manual's only checks are cleaning the filter and calling Dyson.
- If three red lights still flash with the filter cleaned, leave the dryer switched off: Dyson states clearly not to turn it back on.
Safe checks you can perform
- Switch off, unplug and let the dryer cool
- Clean the cage and mesh with a cloth or soft brush
- Refit the cage, switch on once and watch the lights
Leave these tasks to a qualified professional
- Do not attempt this professional task: Call the Dyson customer care line
- Do not attempt this professional task: Filter cleaning done by a service person
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Call the Dyson customer care line
What they doWith three red lights still flashing after the filter is cleaned, the manual points to the Dyson helpline and says the dryer must not be switched on again.
They must show youthe switched-off dryer with its filter cleaned and refitted, and a video of the red flashing.
In writingthe dryer model, the case number and whatever the official brand service decides.
Filter cleaning done by a service person
What they doIf you would rather not do it, whoever does it must follow the manual: dryer unplugged and cool, lint-free cloth or soft brush, and no water on the mesh.
They must show youthe cage and mesh already cleaned, with the cage locked clockwise.
In writingthat the filter was cleaned per the manual and whether the LEDs stopped flashing.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Switch off, unplug and let the dryer cool
- Who:
- you, no tools needed.
- How:
- slide the switch to off, pull the plug from the mains socket and allow the dryer to cool right down. Dyson asks for this every time before the filter is touched, and it lists no other check before that point.
- Result that matters:
- a cold dryer with no power, with the filter reachable at the bottom of the handle.
- If it is still warm:
- wait before handling the filter cage.
- If it is cool:
- go on to cleaning the cage and the mesh.
- Evidence to keep:
- a photo of the lights flashing before switching off and a note of the model, Supersonic HD07 or Supersonic Nural HD16.
Evidence: Dyson Supersonic hair dryer (HD07) - User manual · Dyson Supersonic Nural hair dryer (HD16) - User manual
Clean the cage and mesh with a cloth or soft brush
- Who:
- you, with a lint-free cloth or a soft brush.
- How:
- hold the handle firmly, gently rotate the filter cage anticlockwise and pull it down and away. Remove dust and debris from both the cage and the mesh. Keep water away from the mesh and do not press hard on it.
- Result that matters:
- cage and mesh free of dust and visible hair product residue.
- If there was built-up residue:
- remove all of it before refitting anything.
- If it was already clean:
- carry on to refitting without forcing the mesh.
- Evidence to keep:
- a photo of the mesh and the cage before and after cleaning.
Evidence: Dyson Supersonic hair dryer (HD07) - User manual · Dyson Supersonic Nural hair dryer (HD16) - User manual
Refit the cage, switch on once and watch the lights
- Who:
- you.
- How:
- rotate the filter cage back until it is correctly aligned, then turn it clockwise to lock. Plug the dryer in, switch it on once and see whether the LEDs keep flashing or go back to showing the settings as steady lights.
- Result that matters:
- steady flow and temperature lights instead of continuous flashing.
- If the flashing stops:
- a clogged filter explained it; note the date and repeat the check monthly.
- If all three red lights keep flashing:
- switch off, do not turn it back on, and contact Dyson customer care.
- Evidence to keep:
- a short video of the dryer with the filter refitted, showing the lights.
Evidence: Dyson Supersonic hair dryer (HD07) - User manual · Dyson Supersonic Nural hair dryer (HD16) - User manual
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Appliances
- Brand
- Dyson
- Product type
- Personal care devices
Known code variants
- All three red lights flash
- Dyson Supersonic LED rojos parpadean
- Dyson Supersonic three red LEDs blinking
- Supersonic luces rojas intermitentes
- Supersonic red lights flashing
- Three flashing red LEDs
- Tres LED rojos parpadeantes
- Tres luces rojas parpadeando
What it means
In the user manuals for the Dyson Supersonic hair dryer (HD07) and the Supersonic Nural (HD16), the Diagnostics section says the LEDs flash continuously when the machine needs attention, and the first step is to clean the filter. If all three red lights continue to flash, Dyson asks you to contact its helpline and not to turn the dryer back on. Other models may differ, and the alert alone does not prove that a part is faulty.
Warnings and stop conditions
- Mediumeditorial warning
Do not open the dryer body or try to get round the alert: the manual's only checks are cleaning the filter and calling Dyson.
Evidence: Dyson Supersonic hair dryer (HD07) - User manual
- Highsource verified
If three red lights still flash with the filter cleaned, leave the dryer switched off: Dyson states clearly not to turn it back on.
Evidence: Dyson Supersonic hair dryer (HD07) - User manual · Dyson Supersonic Nural hair dryer (HD16) - User manual
Symptoms and causes
Probable causes · in order
- Filter holding dust or hair product residueCommon
Dyson wants the filter kept free from dust and hair product residue, and checked once a month or whenever the LED lights alert you.
Evidence: Dyson Supersonic hair dryer (HD07) - User manual · Dyson Supersonic Nural hair dryer (HD16) - User manual
- Filter cage not realigned after cleaningPossible
The manual describes turning the filter cage back to its original position, correctly aligned, and locking it clockwise before the dryer is used.
Evidence: Dyson Supersonic hair dryer (HD07) - User manual
- Flashing that carries on after the filter is cleanPossible
When all three red lights keep flashing after cleaning, the manual gives you no further steps and points to the Dyson helpline instead.
Evidence: Dyson Supersonic hair dryer (HD07) - User manual · Dyson Supersonic Nural hair dryer (HD16) - User manual
- Monthly filter check that has been skippedLess common
Hair residue builds up on the mesh over weeks, which is why Dyson sets a monthly check as the routine for looking after the machine.
Evidence: Dyson Supersonic hair dryer (HD07) - User manual
Virtual technician
Does Three flashing red LEDs still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Secador de pelo Dyson Supersonic (HD07) - Manual de usuario
Dyson · 2026 · official_doc
- 2
Dyson Supersonic hair dryer (HD07) - User manual
Dyson · 2026 · official_doc
- 3
Secador Dyson Supersonic Nural (HD16) - Manual de usuario
Dyson · 2026 · official_doc
- 4
Dyson Supersonic Nural hair dryer (HD16) - User manual
Dyson · 2026 · official_doc
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