The a/c on my 01' 530 blows cool but not cold. The compressor is running. It seem like the air is cooler on the driver's side; there's definately some cooling happening. This comes on the heals of a blower that quit working. I replaced the resistor/regulator and the blower now works. The exterior temp. sensor is working, the temps on the controller are set at 60, and the center wheel is set at 3 blue dots. Any ideas???