OK tried it on ALL settings DUAL, AUTO, MODE, REC, at low and high speeds, something that I just noticed tho, it seems like when you control the fan speed vs. using the auto function and setting it on 60, it seems like the auto function is a little bit faster....Also I was trying to remember what all I was hitting when I got the loud pop sound, and I may have hit the REC button just before I got the loud pop, do you think the fan could have sucked up something? I checked the squirrel cage and nothing is in it....