Rep Power: 0

I have a 98 Ex and when my heater/air is on, it makes this weird clicking sound, at low speeds, it lessens at higher speeds...Could this be that there is leaves or **** of some kind caught in it, because there's no cabin filter? Help please...it's freaking me out.

 
Rep Power: 228

Yeah, you can remove three screws behind the glove box to drop the blower motor down and inspect it. As you said, there's probably leaves or debris inside.

 
Rep Power: 812

our old truck makes that "blowing leaf" noise haha. when we opened the vent, all sorts of junk flew at us. thats why we keep em closed.

 
Rep Power: 200

It's happened to me numerous times on Civics. I have heard a lot about bearings going within the blower motor. I usually just replace the blower motor with one that's working (I can find them around for about $20-$40 at junk yards/ebay)