My Electrolux Pure A9 air purifier has been running daily for a couple of years and the fan has become noticeably whinier and grindier.
I’ve been looking for a service manual without luck, obviously Electrolux does not provide them.
Any advice how to lubricate the fan would be much appreciated!
Sorry, I did not. As you say, it seems very hard to get into. I found someone that had made a custom 3D printed tool to open the top panel. I don’t have a 3D printer so it became too big of a project.