Same here. Just took PH04 out of the box. All systems look good but I keep getting an error that there is no water in the tank. I tried all options and the PH04 is not recognizing any water in the tank. Did you receive any other advise?

Not yet. About to take it apart. :-(

Got it apart. Everything checked out. Confirmed the water pump engaged upon insertion into the unit. I am thinking the display control board is bad. I have no remote so a factory reset seems impossible.

Hi ​@fixitCris,

Welcome to the Dyson Community! 

This sounds like an unusual issue, and to help pinpoint the cause we'll need our Customer Care experts to take you through some further troubleshooting checks when you have your Dyson Purifier Humidify + Cool Formaldehyde easily to hand. If a replacement part or a repair is needed, they’ll be able to discuss your options with you.

Please visit Dyson.com and click Support to get in touch with the right Dyson Customer Care team for your region.

We'll look forward to speaking with you!