Pak.... it is impossible for dirty filters to cause the walls to vibrate so that the motors can be heard in other rooms. A dirty filter will only cause a noise that sounds like wind - and it can only be heard in the room that has the dirty filter.
Sorry to say this, but thinking that loose sliding doors or dirty filters is causing the noise is getting us nowhere.
It’s been 11 months now… my solution would take only a day to sort it out.
The rubber mounts were a great solution. Let’s just found out WHICH of the two remaining rooms are making a noise, and THEN find out why. Whatever is the cause, I can guarantee you that is is not loose doors or dirty filters.