a/c switching from icy cold to off , you can hear the compressor kickin in and out . just replaced compressor , dryer, expansion valve,amplifier/controller. I have checked fuses and wiring , still doing it at random. Sometimes it comes on and stays on for 30 - 45 min, other times just 5 mins then wont come back on. Also looked to see if it had freon through little window in line and you can see it moving until it shuts off the compressor. If anyone has any ideas please let me know. Thanks in advance for help!!

might be a limit switch either high or low i know we have em try jumpering it out to see if it stays on

where are the switches located?