Last updated on May 29th, 2022
Following error codes are applied for Dyson air purifiers, including Hot+Cool (HP04, HP01, etc.) and Pure Cool (TP04 and so on).
- F1: A problem with the Piezo. To reset the air purifier, turn it off an unplug. Wait for 60 minutes and plug in & turn it on.
- F2: An UV-C emitter issue. You have to reset the unit instruction the step above.
- F3: Temperature is too cold for an air purifier to operate – below 5°C (41°F).
- F4: Reset the air purifier.
- F5: Same.
There is also an issue when F is blinking after you have replaced a filter on your Dyson air purifier. In this case you have to reset the filter indicator. To do this, simply press and hold On/Off button for at least 6 seconds until the error code is disappeared.