Yeah.. I dont know if this belongs here, I coulnd´t find a proper stack exhange site for this but it sort of involves physics I guess so... yeah.
Basically, I have a ventilator, that after a few mins of functioning starts making this weird noise, like if the air is somehow trapped, and indeed the air flow is reduced considerably.
Feels like if something like a curtain got glued behind the fan, however there is nothing there.
No idea how to even approach this problem, all I know is that this sound comes along with an air flow reduction of about 75%, which sucks.
Any suggestion is very welcome.
This is the ventilator model: https://http2.mlstatic.com/D_NP_627075-MLA29187536462_012019-Q.jpg
Also if I turn it off and wait until the blades stop spinning, then turn it on again the problem goes away for a few seconds/minutes. It´s like it resets.