Air conditioning belt on 1999 Chrysler LHS keeps breaking have replaced it 2 times in the last 2 months?
that could mean there is a bent pulley causing the belt to ride
crooked and break. It could also mean one of the pulleys is locking
up(not turning), which will also cause the belt to break.
Overtightening the belt will also cause the belt to break. I'm
betting one of the pulleys is locking up. I would check the a/c
compressor pulley first, then the others.