I have a 2003 discovery 2 with just under 100k miles. The AC hasn't been working for a while. It quit blowing cold air and then quit blowing any air at all about a month later. I had the blower motor wiring fixed (blown connector above the blower motor) which got the air blowing again, but still no AC. I thought since it had 100K miles that it might be time to charge the AC. When I went to charge it, there was still plenty of refrigerant. I just checked the compressor and the clutch is engaging. I'm at a loss as to what else might be wrong and how to check.