Subject: A/C Belt
Question:

2003, Montero Sport, 3.0, Automatic.
When I accelrate the A/C belt squeals. I had the AC serviced in May, new belts. The AC runs fine except when the RPM's go up. Any advice? Belt not tight enough?
Answer: Ryan,
If the belt was not tight enough, you would hear squealing. If the cold air decreases when your engine speeds up, this could indicate a problem with the A/C compressor motor or with the refrigerant level in the system. You should have your refrigerant level checked by a mechanic to be sure it's sufficient. And also to be sure to have the compressor inspected to be sure it performing nominally.
Good luck!