Newbie here traded my 96 disco in for a 97 4.0 range rover. Truck is mint except the ac. conden. doesnt spin unless you push down on the wheel of the conden. then it turns on and blows cold. if i turn off the ac button inside it shuts it off but wont turn back on if i hit the ac button again unless i push on the conden. wheel. any info just scratchin my head. thanks