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ErrBase

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

Quick Answer

Dyson products use error codes that appear on the LCD display (purifiers and fans) or through LED patterns (cordless vacuums). Fan and purifier codes: F2 = airflow sensor fault (most common - clean the sensor with compressed air).

Dyson products use error codes that appear on the LCD display (purifiers and fans) or through LED patterns (cordless vacuums). Fan and purifier codes: F2 = airflow sensor fault (most common - clean the sensor with compressed air). F3 = humidity sensor fault. F4 = environmental sensor problem. F6 = connectivity module fault. Heater codes: H2 = overheating protection activated (blocked airflow). E4/E5 = heating element fault. E8 = overheat on older AM05/AM09 models. The most searched Dyson error is H2 on Hot+Cool models - it means the air intake or output is blocked, causing the heating element to overheat. The fix is simple: check for obstructions at the base intake and the amplifier loop. Also clean the filter - a clogged filter restricts airflow and triggers H2. Dyson cordless vacuums (V10, V11, V12, V15, Gen5detect) use LED blink patterns for errors: a flashing blue light during use means the battery is low. A flashing red light means a blockage. Solid red = overheated motor (let cool 30 minutes).

DysonAirpurifier

About These Dyson Airpurifier Error Codes

Dyson codes: F2 = airflow sensor (most common fan/purifier error). H2 = overheating from blocked airflow (most common heater error). Clean filter and check for obstructions. Vacuums use LED blinks: red = blockage or overheat.

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

  • Error code on LCD display (F2, F3, H2 etc)
  • Red light on vacuum
  • Dyson stops working
  • Fan or purifier shuts down
  • Heater cuts out during use
  • Dyson app shows error

Tools Required for Diagnosis

FlashlightScrewdriver set

How to Identify Your Error Code

1

Check and clean the filter

Check and clean the filter. Most Dyson purifiers and fan heaters have a removable filter. Remove it and tap gently to remove dust. If it is a HEPA filter, it cannot be washed - replace every 12 months. If washable, rinse under cold water and dry completely for 24 hours.

2

For F2

3

For vacuum errors

4

Factory reset for persistent errors

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
Dyson HEPA FilterModel-specific · $40–$80
Dyson Pre-Filter (washable)Model-specific · $20–$40

Repair vs. Replace Calculator

Appliance Age (Years)7 Yrs
Labor Approach
Our Verdict
BORDERLINE
Estimated Cost: $50 (Parts) vs $450 (New Machine)

Frequently Asked Questions

What does F2 mean on my Dyson fan?
F2 is an airflow sensor fault. The sensor that monitors air movement through the machine is either dirty or has failed. Clean the sensor opening with compressed air first. If F2 persists after cleaning, the sensor needs replacement (Dyson service).
Dyson H2 error on Hot+Cool - is it dangerous?
H2 is a safety response to overheating. The machine detected that the heating element temperature exceeded the safe limit, usually because airflow is blocked. It is not dangerous because the machine shuts down to protect itself. Clean the filter, remove obstructions, and restart.
Dyson vacuum flashing red light but no blockage. What now?
If there is no visible blockage, the motor may have overheated from extended use or thick carpet. Turn off, remove the battery if possible, and wait 30 minutes. If the red light persists after cooling, the motor or battery may have a fault. Check the Dyson app for specific diagnostics (newer models).
How often should I clean my Dyson filter?
Washable pre-filters: monthly under cold water, dry 24 hours. HEPA filters: cannot be washed, replace every 12 months (or when the Dyson app alerts you). A dirty filter is the #1 cause of Dyson error codes.

Models Known to Experience HUB Errors

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

Pure Cool TP04, Pure Hot+Cool HP04, Purifier Hot+Cool HP07, AM09 Fan Heater, V15 Detect, V12 Detect Slim, Gen5detect, Airwrap

Last verified for technical accuracy on March 15, 2026