Dyson Error Codes: Air Purifier, Fan, and Vacuum F, E, H

Quick Answer

Dyson error codes appear on LCD screens or via LED patterns to signal sensor or motor faults. The most common F2 error indicates an airflow sensor issue, which you can usually fix by cleaning the sensor with compressed air.

These codes usually mean your Dyson's sensors are crying for help, not that the machine's dead. I've watched people throw out a $600 purifier over an F2 that needed a 10-second blast of canned air. Ignore these warnings long enough and the motor overworks itself, and that's when the real damage starts. Most of the time you're literally 10 minutes away from a fix.

DysonAirpurifier

About These Dyson Airpurifier Error Codes

OK so here's the deal with Dyson error codes. These machines are genuinely smart and they'll shut themselves down the second something feels off. That's actually good news. But it also means a tiny dust bunny on the wrong sensor triggers a full lockout. The fix is usually way simpler than the scary code makes it look, and honestly most of the time it won't cost you a cent.

Most Common Error Codes

Clogged filter restricting airflow (most common)40%

Airflow sensor dirty (F2)24%

Humidity sensor fault (F3)14%

Heating element overheating (E codes)12%

Blocked intake or output (H2)10%

Symptoms You May Notice

LCD display flashes F2, F3, H2, or an E-series code and the machine stops and won't restart until you clear the fault
Solid red light on your Dyson stick vac and the machine won't turn on at all no matter what you try
Fan or purifier shuts itself off after running for just a few minutes, even though you replaced the filter recently
Hot+Cool heater kicks on for about 30 seconds then cuts out and throws H2 on the screen
Dyson Link app sends a red warning notification to your phone and shows the machine as faulted even if it seemed to be running fine

Tools Required for Diagnosis

Phillips #2 screwdriverSmall flathead screwdriverFlashlight or phone torchCan of compressed air (Dust-Off or similar)Soft-bristle cleaning brush or old toothbrushCoat hanger or flexible drain brush for clearing wand blockages

How to Identify Your Error Code

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name	OEM Number	Estimated Price
Dyson HEPA FilterModel-specific · $40–$80	Model-specific	$40 – $80
Dyson Pre-Filter (washable)Model-specific · $20–$40	Model-specific	$20 – $40

Frequently Asked Questions

What does F2 mean on my Dyson fan?

F2 is an airflow sensor fault, and honestly I see it most on machines kept in bedrooms or near laundry where there's a lot of fine particulates floating around. That sensor's basically a tiny wind meter, and when it gets dusty it can't read air speed correctly anymore. A quick blast of compressed air into the sensor holes usually clears it in about 30 seconds. If that doesn't fix it, the sensor's integrated into the main PCB on most models, so the whole board needs to go. Parts run about $40-80 depending on your specific model.

Dyson H2 error on Hot+Cool - is it dangerous?

H2 is actually a safety feature doing exactly what it's supposed to do, not a failure. It means the heater got too hot because it couldn't breathe properly. Nine times out of ten the base intake is caked in dust or a curtain was pulled against it. Clear whatever's blocking the intake, let the machine sit for a solid 30 minutes so the thermal cutout can reset, and it'll fire right back up. It's not dangerous as long as you let it cool before you start poking around inside. Don't rush the cool-down period.

Dyson vacuum flashing red light but no blockage. What now?

A flashing red light versus a solid red light mean two different things. Flashing usually means the battery's at end of life, especially if the machine's 3-plus years old. Solid red is an overheat warning, usually from running on Max mode on thick carpet for a long stretch. Let it sit for 30 minutes. If it still won't start, flip the machine over and check the gold contact points where the battery connects. Any charring, corrosion, or debris on those contacts will cause exactly this symptom, and a good cleaning with a dry cloth sometimes fixes it completely.

How often should I clean my Dyson filter?

Dyson says monthly, but if you've got pets you really need to do it every two weeks. For washable filters, cold water only and no soap at all. The biggest mistake I see is people putting them back in while they're still damp. That moisture gets pulled straight into the motor and wrecks it. It needs to be completely dry, which honestly takes a full 24 hours sitting in a warm spot. Set an alarm if you have to. Don't rush it.

My Dyson purifier shows an error right after I replaced the filter. What's going on?

This happens more than you'd think and it's almost always one of three things. First, the new filter might not be seated all the way and the machine's still sensing restricted airflow. Press it firmly until it clicks. Second, you might have the wrong filter for your specific model because they look really similar but they're not all interchangeable. Third, and this is the one people always miss, you need to reset the filter counter after replacing it. On most Dyson purifiers you hold the power button for 5-6 seconds right after putting in the new filter. Skip that step and the machine still thinks the old dirty filter is installed.

Models Known to Experience HUB Errors

This repair applies to most Dyson airpurifiers with this error code. Common model numbers include:

Pure Cool TP04, Purifier Cool TP09, Pure Hot+Cool HP04, Purifier Hot+Cool HP07, V15 Detect SV22, V12 Detect Slim SV20, Gen5detect SV23, AM09 Hot+Cool Fan Heater

Written by

Sarah Kim

Smart Home & Specialty Appliance Tech · 12 years experience

Last verified for technical accuracy on March 15, 2026