Where is the low pressure shut off switch for the ac compressor

Hello, The low pressure switch could be anywhere on the low pressure side of the A/C system, as in anywhere between the evaporator coil and the compressor. Most likely it will be on the condensing unit. Two items of concern The low pressure switch constantly measures the pressure in the low side of the system, so resetting the switch is not a procedure. The other is that replacing the switch requires the A/C unit be evacuated and refilled. Something that cannot be done without the proper equipment.