Okay, after taking off the fan and messing with the extruder, I found something interesting. I'm sure it isn't reccomended, but I tried feeding the filament while the fan was removed in order to observe what was happening. The filament pushed through the gear fine enough, but was stopped just past that, at the opening for the head. From what I've read, this shouldn't happen because any material below the gears should be nice and soft, but I am still having troubles. I have tried pushing a hot safety pin through the head, but I haven't been able to make any headway or go any depth.

Again, thanks for any help!