I have a LG window AC unit and the compressor will not turn off unless unplugged

SOURCE: maytag window ac unit

Feel the motor and see if hes hot ...... spin the fan by hand and see if it spins freely  if not the bearings have seized up.   So either rebuild the fan motor simply by replacing the bearings and oiling them and that should fix your problem.    IF the fan spins freely   OHM out the fan  and make sure there is no shorts or openings in the fan.     if your fan motor checks out good both mechanically and electrically  then your next step is to check the capacitor and control board

SOURCE: Sears Kenmore Amana window ac

Sounds like a dirty coil or stuck thermostat

SOURCE: LG AC compressor problem

Compressor may be locking up. Run capacitor may be weak or loose wire. Sounds like major voltage drop off as unit head pressure increases.

SOURCE: I have a LG window AC Model LWHD8008R. Won't power up?

Replace reset switch or bypass it to make sure it is the problem. Check for low voltage while the unit is on. Shoud stay above 105 vac

SOURCE: compressor on my RV coleman ac unit bogging down

Take a look at your start capacitor. This the capacitor that kicks the compressor over when it tries to start. If the capacitor is bad, it cannot kick the compressor back over after the first cycle because the head pressure has not evened out yet. It is located in the upper unit on the side panel in a small box. Be careful, highly charged capacitors can zap you if you are not careful. Disconnect power and touch across the terminals with a meter or a screwdriver to discharge the capacitor.

Hope this helps,

Jeff