My AC started blowing hot air the other day. Also started making a strange rattling noise. Popped the hood but couldn't find a source at first and the noise stopped. Tried again to see that part of my fan clutch was spinning and would hit the other part causing the noise. Looks like the brackets holding the "outer ring" to the front "fan clutch plate" have been broken or cut. The ring just spins and spins, but it seems the clutch never engages. Any ideas for a fix, or do you think I need a new unit?