I am Looking for the name of a horror movie from a long time ago?!

I am Looking for the name of a horror movie from a long time ago?

I am looking for the name of a horror movie from the 70's or the early 80's. It is not Killer Klowns from outer Space or Poltergeist. A groups of teenagers are in this house and they keep hearing what they call "sounds like a clown laughing" although I remember saying at that time that it didn't sound like a clown laughing at all but sounded like someone saying rff fre fr fr rr. Just mumbling incoherent sounds in other words. I also remember there being somethin gbaout a fan who's blades would kill people and then for one reason or another it would be clean whenever anyone would come back in and find the body.

2 weeks ago
Definitely is not "It or Dolls or Puppet Master or Clownhouse, thanks anyway.

...perhaps, "ClownHouse", from 1989??? Sounds somewhat similar...