dyson hp04 exclamation mark

[Tim100]

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all i get when i switch it on is a exclamation mark in a triangle  cannot get it to do anything else  have tried this  but will not do it


 ⁠Switch On

⁠Press Night Mode button once

⁠Hold down Flow Mode button for 11-13 seconds

⁠Press Oscillation button once

⁠<engineering screen will appear>

⁠Press button six(?) times to show fault code screen

⁠To exit the Engineering Menu press any button but the button

[MVacs]

Have you checked the app? Assuming you have it and it is connected. It should tell you there what is wrong.