![Amazon.com: Dyson Pure Hot + Cool Air Purifier, Heater + Fan - HEPA Air Filter, Space Heater and Certified Asthma + Allergy Friendly, WiFi-Enabled – HP04 : Home & Kitchen Amazon.com: Dyson Pure Hot + Cool Air Purifier, Heater + Fan - HEPA Air Filter, Space Heater and Certified Asthma + Allergy Friendly, WiFi-Enabled – HP04 : Home & Kitchen](https://m.media-amazon.com/images/I/61AOnUbp3DL.jpg)
Amazon.com: Dyson Pure Hot + Cool Air Purifier, Heater + Fan - HEPA Air Filter, Space Heater and Certified Asthma + Allergy Friendly, WiFi-Enabled – HP04 : Home & Kitchen
![Troubleshoot for 999 PM2.5 Sensor Problem- Dyson TP04 TP06 TP07 TP7A TP09 HP04 HP06 HP07 HP7A HP09 - YouTube Troubleshoot for 999 PM2.5 Sensor Problem- Dyson TP04 TP06 TP07 TP7A TP09 HP04 HP06 HP07 HP7A HP09 - YouTube](https://i.ytimg.com/vi/N9nDgRun69U/hq720.jpg?sqp=-oaymwEhCK4FEIIDSFryq4qpAxMIARUAAAAAGAElAADIQj0AgKJD&rs=AOn4CLAUkJQIZWvwv1SLa-utj0M0fgaZfA)
Troubleshoot for 999 PM2.5 Sensor Problem- Dyson TP04 TP06 TP07 TP7A TP09 HP04 HP06 HP07 HP7A HP09 - YouTube
![My Dyson TP04 is on 999 and has been for several days. I have taken the filters out, wiped them down(dry, not wet), reset the filter and nothing has helped. I am My Dyson TP04 is on 999 and has been for several days. I have taken the filters out, wiped them down(dry, not wet), reset the filter and nothing has helped. I am](https://i.redd.it/vg9msrd8w8o41.jpg)