Just a couple of weeks ago my Fit's fan started to rattle while I was idling. Now it is a full on drone. It still blows air. Wondering if a bearing may be shot or if something got in the vent. It honestly sounds like it is loose because when I get up to highway speeds the sound isn't as prevalent.

Curious as to what you guys think it may be, and how easy is it to get up there and take a look. Would prefer to have it be DIY.

Thanks!