Ac doesn’t turn on, no Freon leak, has enough, have bypassed low pressure switch on accumulator, no high pressure switch located-(have checked around condenser and high side lines-this is a dual cooling unit. No codes, ac switch does light up when turned on and both blowers are working-could the three cooling fan relays have anything to do with activating the compressor? I did notice that the cooling fan motors do not speed up when turning on ac, and also engine temperature is running right where it should be, at 210 degrees, never overheats
Front ac stopped first, then the back. Had it charged back up, still nothing. Tried glow freon w/blacklight, no leak. Tried leak stop and more freon, nothing.
Taken it to 4 diff shops and no solutions, each charging over 7 to 8 hundred each time. Been 2 summers now with no ac.
The AC Compressor went out and we replaced it. Ever since then the temperature and zone controls do not respond on the front control. The fan speed works, the buttons all work, but no zone or temperature adjustment. The rear control works fine. I have tried replacing the control unit in the dash and the blend door and zone actuators. I have no codes, SnapOn scanner does not show any faults, but forcing the actuator positions through the scanner does not work either.
My 2007 Suburban was dropping voltage down to 12.3 sometimes. Replaced the alternator and now it’s at 14v all the time except if I turn on the a/c and or the headlight it will drop dow to 12.3z