rooster,
I've got the same problem but with both the front fans not working all the time .I was going to call nexnix a couple of weeks ago but totaly forgot!!!!I must admit im not using my hs10 as much as i thought i would-bought in january and only have 35 hours on the clock
The fan is on all the time. What i have been seeing is the plasric structure in front of the fan. Looks like a fan as well . Of course when the fan is spinning you cant see it
Had a knife up at it trying to move the plastic structure.....ill get my coat now