Range hood not pulling air at start.
So we have this Siemens range hood in our apartment that, when turned on, will just make a lot of noise whilst not sucking in any air for about a minute, before i hear a soft "thud", and literally feel the pressure in the room drop, as the sound becomes normal again and it vents properly.
I'm thinking that maybe it has a kind of gravity powered trapdoor that prevents drafts and pests from outside from coming in, and that it's probably covered in grease and therefore sticking?
It's done this for as long as we've lived here, but it was always only a couple of seconds, so we thought it was part of the design or something.
I did recently de-greased the filters, and the actual fan housing was CAKED in grease. Perhaps a full teardown is needed?