Hello all... I gotta problem with the ac.. my ac compressor works, I ran a lead from the battery and it turned on. Does anybody know what would cause it not to turn on.... I checked all the fuses I thought... I really need help... any thoughts are appreciated

 

im pretty sure there is a pressure switch that wont allow it to kick on if your system is low..you might have a slow leak, or it might just need recharged.....