Dyson Air Purifier Error Code F18: How to Fix It

Easy 30 minutes to 1 hour (depending on filter drying time) Medium Severity Verified June 2026
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Error Code
F18
Brand
Dyson
Product Type
air_purifier
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
30 minutes to 1 hour (depending on filter drying time)
Error code F18 on your Dyson air purifier indicates that the unit has overheated and shut down as a safety precaution. This typically happens when the air intake or filters are blocked, or the purifier is placed too close to a heat source. Follow these steps to resolve the issue and get your purifier running again.
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Tools You'll Need

How to Fix Error Code F18

  1. Turn Off and Unplug the Purifier

    Always unplug the appliance before cleaning to avoid electric shock.

  2. Check the Location and Remove Obstructions

  3. Clean or Replace the Filter

    Do not use detergent or heat to dry the filter, as this can damage it.

  4. Clean the Vents and Sensors

  5. Wait and Restart the Purifier

Parts You May Need

Dyson air purifier replacement filter
Check Price on Amazon
Dyson air purifier replacement filter
Check Price on Amazon
Dyson air purifier replacement filter
Check Price on Amazon
Dyson air purifier replacement filter
Check Price on Amazon
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When to Call a Professional

If the error code reappears after following all steps, or if the purifier shows signs of electrical damage (burning smell, sparks), contact Dyson customer support or a certified technician.

Frequently Asked Questions

What causes Dyson air purifier error F18?
Error F18 is triggered when the internal temperature exceeds safe limits, usually due to blocked airflow, a dirty filter, or placement near a heat source.
Can I use my Dyson purifier while the F18 error is showing?
No, the purifier automatically shuts down to prevent damage. You must resolve the overheating issue before restarting.
How long should I wait for the purifier to cool down?
Allow at least 30 minutes to 1 hour for the purifier to cool down before attempting to restart.
Will a clogged filter cause error F18?
Yes, a heavily clogged filter restricts airflow and causes the motor to work harder, leading to overheating and error F18.
Do I need to reset the purifier after fixing the overheat?
No manual reset is needed. The error will clear automatically once the unit cools down and the underlying issue is resolved.

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